It took @mathbabbler 509 days to tweet one kilotweet. While in the process of creating a nBAB for 509, MathBabbler learned that 509 was a

sexy primewith`.`

503MathBabbler Number Analyst (MBNA) output: ========================================= 503 is a natural, whole, integer 503 is odd 503 proper divisors are: 1, 503 is deficient (sum of divisors is 1) 503 is unhappy 503 is not a Harshad number 503 is prime ...Cousin prime with 499 ...Safe prime with 251 ...Sexy prime with 509 ...OEIS:002145 (4n+3; n=125) ...Left-truncatable ...Eisenstein 503 is the sum of 3 consecutive primes 503 = 163 + 167 + 173 503 in octal is 0767 503 in hexadecimal is 0x1f7 503 in binary is 111110111 (is evil) 503 nearest square numbers: -19...26 (484...529 [23]) sqrt(503) = 22.4277 ln(503) = 6.22059 log(503) = 2.70157 503 reciprocal is .00198807157057654075546719681908 503! is 1.54354e+1142 503 is 160.11 Pi years 503 is 25 score and 3 years 503 written as a Roman numeral is DIII 503 = 252^2 - 251^2 and 252 + 251 = 503

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 31 October 2010

This work is licensed under a Creative Commons Attribution 3.0 United States License.