91964691 has 24 divisors (see below), whose sum is σ = 163494240. Its totient is φ = 48508416.

The previous prime is 91964627. The next prime is 91964701. The reversal of 91964691 is 19646919.

It is not a de Polignac number, because 91964691 - 2⁶ = 91964627 is a prime.

It is a super-3 number, since 3×91964691³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (91964491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55326 + ... + 56963.

It is an arithmetic number, because the mean of its divisors is an integer number (6812260).

Almost surely, 2^91964691 is an apocalyptic number.

91964691 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

91964691 is a deficient number, since it is larger than the sum of its proper divisors (71529549).

91964691 is a wasteful number, since it uses less digits than its factorization.

91964691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112315 (or 112312 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 91964691 is about 9589.8222611266. The cubic root of 91964691 is about 451.3779834594.

The spelling of 91964691 in words is "ninety-one million, nine hundred sixty-four thousand, six hundred ninety-one".