91713372 has 12 divisors (see below), whose sum is σ = 213997896. Its totient is φ = 30571120.

The previous prime is 91713337. The next prime is 91713379. The reversal of 91713372 is 27331719.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×91713372² = 16822685207220768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91713379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3821379 + ... + 3821402.

It is an arithmetic number, because the mean of its divisors is an integer number (17833158).

Almost surely, 2^91713372 is an apocalyptic number.

It is an amenable number.

91713372 is an abundant number, since it is smaller than the sum of its proper divisors (122284524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91713372 is a wasteful number, since it uses less digits than its factorization.

91713372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7642788 (or 7642786 counting only the distinct ones).

The product of its digits is 7938, while the sum is 33.

The square root of 91713372 is about 9576.7098734377. The cubic root of 91713372 is about 450.9664365398.

The spelling of 91713372 in words is "ninety-one million, seven hundred thirteen thousand, three hundred seventy-two".