91927631 has 2 divisors, whose sum is σ = 91927632. Its totient is φ = 91927630.

The previous prime is 91927609. The next prime is 91927669. The reversal of 91927631 is 13672919.

It is a happy number.

It is an a-pointer prime, because the next prime (91927669) can be obtained adding 91927631 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91927631 - 2²⁶ = 24818767 is a prime.

It is a super-2 number, since 2×91927631² = 16901378682544322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91927601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45963815 + 45963816.

It is an arithmetic number, because the mean of its divisors is an integer number (45963816).

Almost surely, 2^91927631 is an apocalyptic number.

91927631 is a deficient number, since it is larger than the sum of its proper divisors (1).

91927631 is an equidigital number, since it uses as much as digits as its factorization.

91927631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 38.

The square root of 91927631 is about 9587.8898095462. The cubic root of 91927631 is about 451.3173431005.

The spelling of 91927631 in words is "ninety-one million, nine hundred twenty-seven thousand, six hundred thirty-one".