About the Number 457 (four hundred fifty-seven)

457 was the smallest number without a nBAB on 31 December 2017.

MathBabbler Number Analyst (MBNA) output:
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457 is natural, counting, whole, integer
457 is odd (not even)
457 is not extremely odd
457 proper divisors are: 1,
457 has 1 proper divisors
457 is deficient (sum of divisors is 1; ratio: 0.00218818)
457 is unhappy
457 is a Squarefree Number
457 is prime (not composite)
...Cousin prime with 461
...Sexy prime with 463
...Sexy Quadruple prime with 445, 451, 463
...Truman Gerald (p+30) prime with 487
...Pythagorean prime
...Strong prime
...prime triplet {457, 461, 463}
457 is the sum of 3 consecutive primes
457 = 149 + 151 + 157
457 in octal is 0711
457 in hexadecimal is 0x1c9
457 in binary is 111001001 (is odious)
457 nearest square numbers: -16...27 (441...484 [22])
sqrt(457) = 21.3776
ln(457) = 6.12468
log(457) = 2.65992
457! is 6.89053e+1018
457 is 145.468 Pi years
457 is 22 score and 17 years
457 written as a Roman numeral is CDLVII
457 is 229^2 - 228^2 and 229 + 228 = 457
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457 reciprocal is 0.00218818380743982494529540481400437636761487964989059080962800875273522975929978118161925601750547045951859956236323851203501094091903719912472647702407
remainders: 
1,10,100,86,403,374,84,383,174,369,34,340,201,182,449,377,114,226,432,207,242,135,436,247,185,22,220,372,64,183,2,20,200,172,349,291,168,309,348,281,68,223,402,364,441,297,228,452,407,414,27,270,415,37,370,44,440,287,128,366,4,40,400,344,241,125,336,161,239,105,136,446,347,271,425,137,456,447,357,371,54,83,373,74,283,88,423,117,256,275,8,80,343,231,25,250,215,322,21,210,272,435,237,85,393,274,455,437,257,285,108,166,289,148,109,176,389,234,55,93,16,160,229,5,50,43,430,187,42,420,87,413,17,170,329,91,453,417,57,113,216,332,121,296,218,352,321,11,110,186,32,320,1

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 31 December 2017

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