91979525 has 24 divisors (see below), whose sum is σ = 126554400. Its totient is φ = 65748800.

The previous prime is 91979509. The next prime is 91979527. The reversal of 91979525 is 52597919.

It is not a de Polignac number, because 91979525 - 2⁴ = 91979509 is a prime.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 91979525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91979527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13391 + ... + 19059.

It is an arithmetic number, because the mean of its divisors is an integer number (5273100).

Almost surely, 2^91979525 is an apocalyptic number.

It is an amenable number.

91979525 is a deficient number, since it is larger than the sum of its proper divisors (34574875).

91979525 is a wasteful number, since it uses less digits than its factorization.

91979525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5749 (or 5744 counting only the distinct ones).

The product of its digits is 255150, while the sum is 47.

The square root of 91979525 is about 9590.5956540770. The cubic root of 91979525 is about 451.4022514002.

The spelling of 91979525 in words is "ninety-one million, nine hundred seventy-nine thousand, five hundred twenty-five".