91975972 has 36 divisors (see below), whose sum is σ = 177783760. Its totient is φ = 41603760.

The previous prime is 91975957. The next prime is 91975991. The reversal of 91975972 is 27957919.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148279 + ... + 148897.

Almost surely, 2^91975972 is an apocalyptic number.

It is an amenable number.

91975972 is a deficient number, since it is larger than the sum of its proper divisors (85807788).

91975972 is a wasteful number, since it uses less digits than its factorization.

91975972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 939 counting only the distinct ones).

The product of its digits is 357210, while the sum is 49.

The square root of 91975972 is about 9590.4104187464. The cubic root of 91975972 is about 451.3964390456.

The spelling of 91975972 in words is "ninety-one million, nine hundred seventy-five thousand, nine hundred seventy-two".