About the Number 291 (two hundred ninety-one)

291 was the smallest number that didn't have a nBAB on 14 April 2016. MathBabbler is trying to ensure that the numbers 0-300 have nBABs by the end of the Spring 2016 Semester. With the posting of this nBAB for 291, 292 became the smallest number without a nBAB on 14 April 2016.

MathBabbler Number Analyst (MBNA) output:
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291 is a natural, whole, integer
291 is odd
291 proper divisors are: 1,3,97,
291 has 3 proper divisors
291 is deficient (sum of divisors is 101; ratio: 0.347079)
291 is happy
291 is a Squarefree Number
291 is composite (not prime)
291 has the prime factors: 3*97 (sum=100)
291 is semiprime (biprime or 2-almost prime)
291 is a 97-smooth number
291 is Arithmetic (A003601)
291 in octal is 0443
291 in hexadecimal is 0x123
291 in binary is 100100011 (is evil)
291 nearest square numbers: -2...33 (289...324 [18])
sqrt(291) = 17.0587
ln(291) = 5.67332
log(291) = 2.46389
291 reciprocal is .00343642611683848797250859106529
291! is 1.7552e+592
291 is 92.6282 Pi years
291 is 14 score and 11 years
291 written as a Roman numeral is CCXCI
291 is 146^2 - 145^2 and 146 + 145 = 291
291 is a multiple of 1 & it contains a 1 (A011531)

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 14 April 2016

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