6000 (six thousand) is the natural number following 5999 and preceding 6001.

Selected numbers in the range 6001–6999

6001 to 6099 6028 – centered heptagonal number 6037 – super-prime 6047 – safe prime 6053 – Sophie Germain prime 6064 – ≈ ∛2 6069 – nonagonal number 6073 – balanced prime 6084 = 782, sum of the cubes of the first twelve integers 6081 – sum of the first 54 primes 6089 – highly cototient number 6095 – magic constant of n × n normal magic square and n-Queens Problem for n = 23.

6100 to 6199 6101 – Sophie Germain prime 6105 – triangular number 6113 – Sophie Germain prime, super-prime 6131 – Sophie Germain prime, twin prime with 6133 6133 – 800th prime number, twin prime with 6131 6143 – Thabit number 6173 – Sophie Germain prime 6174 – Kaprekar's constant 6181 – octahedral number

6200 to 6299 6200 – harmonic divisor number 6201 – square pyramidal number 6216 – triangular number 6217 – super-prime 6229 – super-prime 6232 – amicable number with 6368 6241 = 792, centered octagonal number 6250 – Leyland number 6263 – Sophie Germain prime, balanced prime 6269 – Sophie Germain prime 6280 – decagonal number

6300 to 6399 6311 – super-prime 6317 – balanced prime 6322 – centered heptagonal number 6323 – Sophie Germain prime, balanced prime, super-prime 6328 – triangular number 6329 – Sophie Germain prime 6337 – star prime 6338 – sum of the first 55 primes – number of verses in the Qur'an according to the sect founded by Rashad Khalifa. 6361 – twin prime 6364 – nonagonal number 6367 – balanced prime 6368 – amicable number with 6232 6373 – balanced prime, sum of three and seven consecutive primes (2113 + 2129 + 2131 and 883 + 887 + 907 + 911 + 919 + 929 + 937) 6399 – smallest integer that cannot be expressed as a sum of fewer than 279 eighth powers

6400 to 6499 6441 – triangular number 6449 – Sophie Germain prime 6466 – Markov number 6480 – smallest number with exactly 50 factors 6491 – Sophie Germain prime

6500 to 6599 6509 – highly cototient number 6521 – Sophie Germain prime 6542 – number of primes . 6545 – tetrahedral number 6551 – Sophie Germain prime 6555 – triangular number 6556 – member of a Ruth-Aaron pair with 6557 (first definition) 6557 – member of a Ruth-Aaron pair with 6556 (first definition) 6561 = 812 = 94 = 38, perfect totient number 6563 – Sophie Germain prime 6581 – Sophie Germain prime 6599 – safe prime

6600 to 6699 6601 – Carmichael number, decagonal number, sum of the first 56 primes 6623 – centered heptagonal number 6659 – safe prime 6666 – forty-fourth nonagonal number, and the 11th third-convolution of Fibonacci numbers. 6670 – triangular number, centered nonagonal number, centered 19-gonal number,

6700 to 6799 6719 – safe prime, highly cototient number 6733 – star prime 6728 – number of domino tilings of a 6×6 checkerboard 6761 – Sophie Germain prime 6765 – 20th Fibonacci number 6779 – safe prime 6786 – triangular number

6800 to 6899 6811 – member of a Ruth-Aaron pair with 6812 (first definition) 6812 – member of a Ruth-Aaron pair with 6811 (first definition) 6827 – safe prime 6841 – largest right-truncatable prime in base 7 6842 – number of parallelogram polyominoes with 12 cells 6863 – balanced prime 6870 – sum of the first 57 primes 6879 – number of planar partitions of 15 6880 – vampire number 6889 = 832, centered octagonal number 6899 – Sophie Germain prime, safe prime

6900 to 6999 6903 – triangular number 6924 – magic constant of n × n normal magic square and n-Queens Problem for n = 24. 6929 – highly cototient number 6930 – decagonal number, square pyramidal number 6931 – centered heptagonal number 6975 – nonagonal number 6977 – balanced prime 6983 – Sophie Germain prime, safe prime 6997 – 900th prime number

Prime numbers There are 117 prime numbers between 6000 and 7000: 6007, 6011, 6029, 6037, 6043, 6047, 6053, 6067, 6073, 6079, 6089, 6091, 6101, 6113, 6121, 6131, 6133, 6143, 6151, 6163, 6173, 6197, 6199, 6203, 6211, 6217, 6221, 6229, 6247, 6257, 6263, 6269, 6271, 6277, 6287, 6299, 6301, 6311, 6317, 6323, 6329, 6337, 6343, 6353, 6359, 6361, 6367, 6373, 6379, 6389, 6397, 6421, 6427, 6449, 6451, 6469, 6473, 6481, 6491, 6521, 6529, 6547, 6551, 6553, 6563, 6569, 6571, 6577, 6581, 6599, 6607, 6619, 6637, 6653, 6659, 6661, 6673, 6679, 6689, 6691, 6701, 6703, 6709, 6719, 6733, 6737, 6761, 6763, 6779, 6781, 6791, 6793, 6803, 6823, 6827, 6829, 6833, 6841, 6857, 6863, 6869, 6871, 6883, 6899, 6907, 6911, 6917, 6947, 6949, 6959, 6961, 6967, 6971, 6977, 6983, 6991, 6997

See also Year 6000

References