91234864 has 30 divisors (see below), whose sum is σ = 205629324. Its totient is φ = 39100320.

The previous prime is 91234861. The next prime is 91234867. The reversal of 91234864 is 46843219.

It is an interprime number because it is at equal distance from previous prime (91234861) and next prime (91234867).

It is not an unprimeable number, because it can be changed into a prime (91234861) 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, 57402 + ... + 58969.

Almost surely, 2^91234864 is an apocalyptic number.

It is an amenable number.

91234864 is an abundant number, since it is smaller than the sum of its proper divisors (114394460).

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

91234864 is a wasteful number, since it uses less digits than its factorization.

91234864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116393 (or 116380 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 91234864 is about 9551.6942999658. The cubic root of 91234864 is about 450.1807734607.

It can be divided in two parts, 91 and 234864, that added together give a triangular number (234955 = T₆₈₅).

The spelling of 91234864 in words is "ninety-one million, two hundred thirty-four thousand, eight hundred sixty-four".