91312965 has 12 divisors (see below), whose sum is σ = 158275884. Its totient is φ = 48700224.

The previous prime is 91312939. The next prime is 91312973. The reversal of 91312965 is 56921319.

It can be written as a sum of positive squares in 2 ways, for example, as 54552996 + 36759969 = 7386^2 + 6063^2 .

It is not a de Polignac number, because 91312965 - 2⁶ = 91312901 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1014544 + ... + 1014633.

It is an arithmetic number, because the mean of its divisors is an integer number (13189657).

Almost surely, 2^91312965 is an apocalyptic number.

It is an amenable number.

91312965 is a deficient number, since it is larger than the sum of its proper divisors (66962919).

91312965 is a wasteful number, since it uses less digits than its factorization.

91312965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029188 (or 2029185 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 91312965 is about 9555.7817576586. The cubic root of 91312965 is about 450.3091949110.

The spelling of 91312965 in words is "ninety-one million, three hundred twelve thousand, nine hundred sixty-five".