91313975 has 6 divisors (see below), whose sum is σ = 113229360. Its totient is φ = 73051160.

The previous prime is 91313947. The next prime is 91313977. The reversal of 91313975 is 57931319.

It is a de Polignac number, because none of the positive numbers 2^k-91313975 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91313977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1826255 + ... + 1826304.

It is an arithmetic number, because the mean of its divisors is an integer number (18871560).

Almost surely, 2^91313975 is an apocalyptic number.

91313975 is a deficient number, since it is larger than the sum of its proper divisors (21915385).

91313975 is a wasteful number, since it uses less digits than its factorization.

91313975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3652569 (or 3652564 counting only the distinct ones).

The product of its digits is 25515, while the sum is 38.

The square root of 91313975 is about 9555.8346050986. The cubic root of 91313975 is about 450.3108551740.

The spelling of 91313975 in words is "ninety-one million, three hundred thirteen thousand, nine hundred seventy-five".