91948931 has 2 divisors, whose sum is σ = 91948932. Its totient is φ = 91948930.

The previous prime is 91948907. The next prime is 91948949. The reversal of 91948931 is 13984919.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91948931 - 2²² = 87754627 is a prime.

It is a super-2 number, since 2×91948931² = 16909211824085522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91948951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45974465 + 45974466.

It is an arithmetic number, because the mean of its divisors is an integer number (45974466).

Almost surely, 2^91948931 is an apocalyptic number.

91948931 is a deficient number, since it is larger than the sum of its proper divisors (1).

91948931 is an equidigital number, since it uses as much as digits as its factorization.

91948931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 44.

The square root of 91948931 is about 9589.0005214308. Note that the first 3 decimals coincide. The cubic root of 91948931 is about 451.3521977535.

The spelling of 91948931 in words is "ninety-one million, nine hundred forty-eight thousand, nine hundred thirty-one".