91113972 has 48 divisors (see below), whose sum is σ = 219912000. Its totient is φ = 29341440.

The previous prime is 91113881. The next prime is 91113973. The reversal of 91113972 is 27931119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91113973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52779 + ... + 54477.

It is an arithmetic number, because the mean of its divisors is an integer number (4581500).

Almost surely, 2^91113972 is an apocalyptic number.

It is an amenable number.

91113972 is an abundant number, since it is smaller than the sum of its proper divisors (128798028).

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

91113972 is a wasteful number, since it uses less digits than its factorization.

91113972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856 (or 1854 counting only the distinct ones).

The product of its digits is 3402, while the sum is 33.

The square root of 91113972 is about 9545.3639008683. The cubic root of 91113972 is about 449.9818461812.

The spelling of 91113972 in words is "ninety-one million, one hundred thirteen thousand, nine hundred seventy-two".