100,000,000 (one hundred million) is the natural number following 99,999,999 and preceding 100,000,001.

In scientific notation, it is written as 108.

East Asian languages treat 100,000,000 as a counting unit, significant as the square of a myriad, also a counting unit. In Chinese, Korean, and Japanese respectively it is yi () (or in ancient texts), eok () and oku (). These languages do not have single words for a thousand to the second, third, fifth powers, etc.

100,000,000 is also the fourth power of 100 and also the square of 10,000.

Selected 9-digit numbers (100,000,001–999,999,999)

100,000,001 to 199,999,999 100,000,007 = smallest nine digit prime 100,005,153 = smallest triangular number with 9 digits and the 14,142nd triangular number 100,020,001 = 100012, palindromic square 100,544,625 = 4653, the smallest 9-digit cube 102,030,201 = 101012, palindromic square 102,334,155 = Fibonacci number 104,636,890 = number of trees with 25 unlabeled nodes 107,890,609 = Wedderburn-Etherington number 111,111,111 = repunit, square root of 12345678987654321 111,111,113 = Chen prime, Sophie Germain prime, cousin prime. 120,528,657 = number of centered hydrocarbons with 27 carbon atoms 122,522,400 = least number such that , where = sum of divisors of m 123,456,789 = smallest zeroless base-10 pandigital number 126,390,032 = number of 34-bead necklaces (turning over is allowed) where complements are equivalent 126,491,971 = Leonardo prime 129,145,076 = Leyland number using 3 & 17 (317 + 173) 129,644,790 = Catalan number 130,150,588 = number of 33-bead binary necklaces with beads of 2 colors where the colors may be swapped but turning over is not allowed 134,217,728 = 5123 = 89 = 227 134,218,457 = Leyland number using 2 & 27 (227 + 272) 134,219,796 = number of 32-bead necklaces with 2 colors when turning over is not allowed; also number of output sequences from a simple 32-stage cycling shift register; also number of binary irreducible polynomials whose degree divides 32 136,279,841 = The largest known Mersenne prime exponent, as of October 2024 139,854,276 = 118262, the smallest zeroless base 10 pandigital square 142,547,559 = Motzkin number 157,115,917 = number of parallelogram polyominoes with 24 cells. 165,580,141 = Fibonacci number 167,444,795 = cyclic number in base 6 171,794,492 = number of reduced trees with 36 nodes 177,264,449 = Leyland number using 8 & 9 (89 + 98) 178,956,971 = smallest composite Wagstaff number with prime index 185,794,560 = double factorial of 18 188,378,402 = number of ways to partition {1,2,...,11} and then partition each cell (block) into subcells. 190,899,322 = Bell number 192,622,052 = number of free 18-ominoes 193,707,721 = smallest prime factor of 267 − 1, a number that Mersenne claimed to be prime 199,960,004 = number of surface-points of a tetrahedron with edge-length 9999

200,000,000 to 299,999,999 200,000,002 = number of surface-points of a tetrahedron with edge-length 10000 210,295,326 = Fine number 211,016,256 = number of primitive polynomials of degree 33 over GF(2) 212,890,625 = 1-automorphic number 222,222,227 = safe prime 223,092,870 = the product of the first nine prime numbers, thus the ninth primorial 225,058,681 = Pell number 225,331,713 = self-descriptive number in base 9 232,792,560 = superior highly composite number; colossally abundant number; smallest number divisible by the numbers from 1 to 22 (there is no smaller number divisible by the numbers from 1 to 20 since any number divisible by 3 and 7 must be divisible by 21 and any number divisible by 2 and 11 must be divisible by 22) 240,882,152 = number of signed trees with 16 nodes 244,140,625 = 156252 = 6253 = 1254 = 256 = 512 244,389,457 = Leyland number using 5 & 12 (512 + 125) 245,044,800 = first highly composite number that is not a Harshad number 245,492,244 = number of 35-bead necklaces (turning over is allowed) where complements are equivalent 252,648,992 = number of 34-bead binary necklaces with beads of 2 colors where the colors may be swapped but turning over is not allowed 253,450,711 = Wedderburn-Etherington prime 260,301,176 = number of 33-bead necklaces with 2 colors when turning over is not allowed; also number of output sequences from a simple 33-stage cycling shift register; also number of binary irreducible polynomials whose degree divides 33 267,914,296 = Fibonacci number 268,436,240 = Leyland number using 2 & 28 (228 + 282) 268,473,872 = Leyland number using 4 & 14 (414 + 144) 272,400,600 = the number of terms of the harmonic series required to pass 20 275,305,224 = the number of magic squares of order 5, excluding rotations and reflections 279,793,450 = number of trees with 26 unlabeled nodes 292,475,249 = Leyland number using 7 & 10 (710 + 107) 294,130,458 = number of prime knots with 19 crossings 299,792,458 = the exact definition of the speed of light in a vacuum, in metres per second

300,000,000 to 399,999,999 309,576,725 = number of centered hydrocarbons with 28 carbon atoms 321,534,781 = Markov prime 331,160,281 = Leonardo prime 336,849,900 = number of primitive polynomials of degree 34 over GF(2) 350,238,175 = number of reduced trees with 37 nodes 362,802,072 = number of parallelogram polyominoes with 25 cells 364,568,617 = Leyland number using 6 & 11 (611 + 116) 367,567,200 = 14th colossally abundant number, 14th superior highly composite number 381,654,729 = the only polydivisible number that is also a zeroless pandigital number 387,420,489 = 196832 = 7293 = 276 = 99 = 318 and in tetration notation 29 387,426,321 = Leyland number using 3 & 18 (318 + 183)

400,000,000 to 499,999,999 400,763,223 = Motzkin number 404,204,977 = number of prime numbers having ten digits 405,071,317 = 11 + 22 + 33 + 44 + 55 + 66 + 77 + 88 + 99 433,494,437 = Fibonacci prime, Markov prime 442,386,619 = alternating factorial 444,101,658 = number of (unordered, unlabeled) rooted trimmed trees with 27 nodes 455,052,511 = number of primes below 1010 467,871,369 = number of triangle-free graphs on 14 vertices 477,353,376 = number of 36-bead necklaces (turning over is allowed) where complements are equivalent 477,638,700 = Catalan number 479,001,599 = factorial prime 479,001,600 = 12! 490,853,416 = number of 35-bead binary necklaces with beads of 2 colors where the colors may be swapped but turning over is not allowed 499,999,751 = Sophie Germain prime

500,000,000 to 599,999,999 505,294,128 = number of 34-bead necklaces with 2 colors when turning over is not allowed; also number of output sequences from a simple 34-stage cycling shift register; also number of binary irreducible polynomials whose degree divides 34 535,828,591 = Leonardo prime 536,870,911 = third composite Mersenne number with a prime exponent 536,870,912 = 229 536,871,753 = Leyland number using 2 & 29 (229 + 292) 543,339,720 = Pell number 554,999,445 = a Kaprekar constant for digit length 9 in base 10 556,069,849 = 14,149 × 39,301, the 1,000th strong pseudoprime to base 2 574,304,985 = 19 + 29 + 39 + 49 + 59 + 69 + 79 + 89 + 99 575,023,344 = 14-th derivative of xx at x=1 596,572,387 = Wedderburn-Etherington prime

600,000,000 to 699,999,999 617,323,716 = 248462, palindromic square 635,318,657 = the smallest number that is the sum of two fourth powers in two different ways (), of which Euler was aware. 644,972,544 = 8643, 3-smooth number 648,646,704 = , where φ is the Euler's totient function 654,729,075 = double factorial of 19 670,617,279 = highest stopping time integer under 109 for the Collatz conjecture

700,000,000 to 799,999,999 701,408,733 = Fibonacci number 715,497,037 = number of reduced trees with 38 nodes 715,827,883 = Wagstaff prime, Jacobsthal prime 725,594,112 = number of primitive polynomials of degree 36 over GF(2) 742,624,232 = number of free 19-ominoes 751,065,460 = number of trees with 27 unlabeled nodes 774,840,978 = Leyland number using 9 & 9 (99 + 99) 778,483,932 = Fine number 780,291,637 = Markov prime 787,109,376 = 1-automorphic number 797,790,928 = number of centered hydrocarbons with 29 carbon atoms

800,000,000 to 899,999,999 810,810,000 = smallest number with exactly 1000 factors 837,759,792 – number of parallelogram polyominoes with 26 cells. 839,296,300 – initial number of first century xx00 to xx99 containing at least sixteen prime numbers {839,296,301, 839,296,303, 839,296,309, 839,296,319, 839,296,321, 839,296,327, 839,296,331, 839,296,333, 839,296,349, 839,296,351, 839,296,357, 839,296,361, 839,296,373, 839,296,379, 839,296,397, 839,296,399} since 2,705,000 893,554,688 = 2-automorphic number

900,000,000 to 999,999,999 906,150,257 = smallest counterexample to the Polya conjecture 923,187,456 = 303842, the largest zeroless base-10 pandigital square 928,772,650 = number of 37-bead necklaces (turning over is allowed) where complements are equivalent 929,275,200 = number of primitive polynomials of degree 35 over GF(2) 981,706,832 = number of 35-bead necklaces with 2 colors when turning over is not allowed; also number of output sequences from a simple 35-stage cycling shift register; also number of binary irreducible polynomials whose degree divides 35 987,654,321 = largest zeroless base-10 pandigital number 997,002,999 = 9993, the largest 9-digit cube 999,950,884 = 316222, the largest 9-digit square 999,961,560 = largest triangular number with 9 digits and the 44,720th triangular number 999,999,937 = largest 9-digit prime number

Notes

References

External links

Fine number