91237664 has 24 divisors (see below), whose sum is σ = 205285248. Its totient is φ = 39101760.

The previous prime is 91237651. The next prime is 91237693. The reversal of 91237664 is 46673219.

It is a super-2 number, since 2×91237664² = 16648622664353792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203432 + ... + 203879.

It is an arithmetic number, because the mean of its divisors is an integer number (8553552).

Almost surely, 2^91237664 is an apocalyptic number.

It is an amenable number.

91237664 is an abundant number, since it is smaller than the sum of its proper divisors (114047584).

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

91237664 is a wasteful number, since it uses less digits than its factorization.

91237664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407328 (or 407320 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 91237664 is about 9551.8408696963. The cubic root of 91237664 is about 450.1853787662.

The spelling of 91237664 in words is "ninety-one million, two hundred thirty-seven thousand, six hundred sixty-four".