91477872 has 30 divisors (see below), whose sum is σ = 256011392. Its totient is φ = 30492576.

The previous prime is 91477871. The next prime is 91477873. The reversal of 91477872 is 27877419.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91477871) and next prime (91477873).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91477871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 317488 + ... + 317775.

Almost surely, 2^91477872 is an apocalyptic number.

It is an amenable number.

91477872 is an abundant number, since it is smaller than the sum of its proper divisors (164533520).

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

91477872 is a wasteful number, since it uses less digits than its factorization.

91477872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635277 (or 635268 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 91477872 is about 9564.4065158273. The cubic root of 91477872 is about 450.5801110959.

The spelling of 91477872 in words is "ninety-one million, four hundred seventy-seven thousand, eight hundred seventy-two".