91937816 has 32 divisors (see below), whose sum is σ = 178588800. Its totient is φ = 44325120.

The previous prime is 91937809. The next prime is 91937821. The reversal of 91937816 is 61873919.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95996 + ... + 96948.

It is an arithmetic number, because the mean of its divisors is an integer number (5580900).

Almost surely, 2^91937816 is an apocalyptic number.

It is an amenable number.

91937816 is a deficient number, since it is larger than the sum of its proper divisors (86650984).

91937816 is a wasteful number, since it uses less digits than its factorization.

91937816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379 (or 1375 counting only the distinct ones).

The product of its digits is 81648, while the sum is 44.

The square root of 91937816 is about 9588.4209336053. The cubic root of 91937816 is about 451.3340101872.

The spelling of 91937816 in words is "ninety-one million, nine hundred thirty-seven thousand, eight hundred sixteen".