409was the smallest number without a nBAB on 10 April 2017.MathBabbler Number Analyst (MBNA) output: ========================================= 409 is natural, counting, whole, integer 409 is odd (not even) 409 is not extremely odd 409 proper divisors are: 1, 409 has 1 proper divisors 409 is deficient (sum of divisors is 1; ratio: 0.00244499) 409 is happy 409 is a Squarefree Number 409 is prime (not composite) ...Truman Gerald (p+30) prime with 439 ...Truman Gerald (p-30) prime with 379 ...Pythagorean prime 409 is a lucky number 409 in octal is 0631 409 in hexadecimal is 0x199 409 in binary is 110011001 (is odious) 409 nearest square numbers: -9...32 (400...441 [21]) sqrt(409) = 20.2237 ln(409) = 6.01372 log(409) = 2.61172 409! is 1.87685e+892 409 is 130.189 Pi years 409 is 20 score and 9 years 409 written as a Roman numeral is CDIX 409 is 205^2 - 204^2 and 205 + 204 = 409 ____________________________________________________________________________________________________________________________________________________________________________________________________________ 409 reciprocal is 0.002444987775061124694376528117359413202933985330073349633251833740831295843520782396088019559902200488997555012224938875305623471882640586797066014669926650366748166259168704156479217603911980440097799511

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

**Created:** 10 April 2017

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