91615875 has 32 divisors (see below), whose sum is σ = 164184384. Its totient is φ = 45100800.

The previous prime is 91615859. The next prime is 91615879. The reversal of 91615875 is 57851619.

It is not a de Polignac number, because 91615875 - 2⁴ = 91615859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91615879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4522 + ... + 14271.

It is an arithmetic number, because the mean of its divisors is an integer number (5130762).

Almost surely, 2^91615875 is an apocalyptic number.

91615875 is a deficient number, since it is larger than the sum of its proper divisors (72568509).

91615875 is a wasteful number, since it uses less digits than its factorization.

91615875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18824 (or 18814 counting only the distinct ones).

The product of its digits is 75600, while the sum is 42.

The square root of 91615875 is about 9571.6182017462. The cubic root of 91615875 is about 450.8065781203.

The spelling of 91615875 in words is "ninety-one million, six hundred fifteen thousand, eight hundred seventy-five".