About the Number 409 (four hundred nine)

409 was the smallest number without a nBAB on 10 April 2017.

MathBabbler Number Analyst (MBNA) output:
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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
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409 reciprocal is 0.002444987775061124694376528117359413202933985330073349633251833740831295843520782396088019559902200488997555012224938875305623471882640586797066014669926650366748166259168704156479217603911980440097799511

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 10 April 2017

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