91363665 has 32 divisors (see below), whose sum is σ = 153418752. Its totient is φ = 46368000.

The previous prime is 91363651. The next prime is 91363667. The reversal of 91363665 is 56636319.

It is not a de Polignac number, because 91363665 - 2⁸ = 91363409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91363667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26755 + ... + 29975.

It is an arithmetic number, because the mean of its divisors is an integer number (4794336).

Almost surely, 2^91363665 is an apocalyptic number.

It is an amenable number.

91363665 is a deficient number, since it is larger than the sum of its proper divisors (62055087).

91363665 is a wasteful number, since it uses less digits than its factorization.

91363665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3321.

The product of its digits is 87480, while the sum is 39.

The square root of 91363665 is about 9558.4342337017. The cubic root of 91363665 is about 450.3925217129.

The spelling of 91363665 in words is "ninety-one million, three hundred sixty-three thousand, six hundred sixty-five".