91236872 has 16 divisors (see below), whose sum is σ = 172219500. Its totient is φ = 45311680.

The previous prime is 91236839. The next prime is 91236877. The reversal of 91236872 is 27863219.

It can be written as a sum of positive squares in 2 ways, for example, as 78605956 + 12630916 = 8866^2 + 3554^2 .

It is not an unprimeable number, because it can be changed into a prime (91236877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37079 + ... + 39462.

Almost surely, 2^91236872 is an apocalyptic number.

It is an amenable number.

91236872 is a deficient number, since it is larger than the sum of its proper divisors (80982628).

91236872 is a wasteful number, since it uses less digits than its factorization.

91236872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76696 (or 76692 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 91236872 is about 9551.7994116292. The cubic root of 91236872 is about 450.1840761322.

The spelling of 91236872 in words is "ninety-one million, two hundred thirty-six thousand, eight hundred seventy-two".