91965331 has 2 divisors, whose sum is σ = 91965332. Its totient is φ = 91965330.

The previous prime is 91965329. The next prime is 91965343. The reversal of 91965331 is 13356919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91965331 - 2¹ = 91965329 is a prime.

It is a super-3 number, since 3×91965331³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 91965329, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (91965361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45982665 + 45982666.

It is an arithmetic number, because the mean of its divisors is an integer number (45982666).

Almost surely, 2^91965331 is an apocalyptic number.

91965331 is a deficient number, since it is larger than the sum of its proper divisors (1).

91965331 is an equidigital number, since it uses as much as digits as its factorization.

91965331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21870, while the sum is 37.

The square root of 91965331 is about 9589.8556297788. The cubic root of 91965331 is about 451.3790305324.

The spelling of 91965331 in words is "ninety-one million, nine hundred sixty-five thousand, three hundred thirty-one".