91938872 has 16 divisors (see below), whose sum is σ = 181458600. Its totient is φ = 43549920.

The previous prime is 91938871. The next prime is 91938877. The reversal of 91938872 is 27883919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91938871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302279 + ... + 302582.

Almost surely, 2^91938872 is an apocalyptic number.

It is an amenable number.

91938872 is a deficient number, since it is larger than the sum of its proper divisors (89519728).

91938872 is a wasteful number, since it uses less digits than its factorization.

91938872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604886 (or 604882 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 91938872 is about 9588.4759998657. The cubic root of 91938872 is about 451.3357381917.

The spelling of 91938872 in words is "ninety-one million, nine hundred thirty-eight thousand, eight hundred seventy-two".