91608645 has 32 divisors (see below), whose sum is σ = 150595200. Its totient is φ = 47533824.

The previous prime is 91608613. The next prime is 91608653. The reversal of 91608645 is 54680619.

It is not a de Polignac number, because 91608645 - 2⁵ = 91608613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110091 + ... + 110919.

It is an arithmetic number, because the mean of its divisors is an integer number (4706100).

Almost surely, 2^91608645 is an apocalyptic number.

It is an amenable number.

91608645 is a deficient number, since it is larger than the sum of its proper divisors (58986555).

91608645 is a wasteful number, since it uses less digits than its factorization.

91608645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 91608645 is about 9571.2405152101. The cubic root of 91608645 is about 450.7947191228.

The spelling of 91608645 in words is "ninety-one million, six hundred eight thousand, six hundred forty-five".