173 (one hundred [and] seventy-three) is the natural number following 172 and preceding 174.
In mathematics 173 is: an odd number. a deficient number. an odious number. a balanced prime. an Eisenstein prime with no imaginary part. a Sophie Germain prime. a Pythagorean prime. a Higgs prime. an isolated prime. a regular prime. a sexy prime. a twice sexy prime (167, 173; 173, 179). a truncatable prime. an inconsummate number. the sum of 2 squares: 22 + 132. the sum of three consecutive prime numbers: 53 + 59 + 61. Palindromic number in bases 3 (201023) and 9 (2129). the 40th prime number following 167 and preceding 179.
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Number Facts and Trivia: 173 Prime curiosities: 173 Number Gossip: 173