91805968 has 40 divisors (see below), whose sum is σ = 182675808. Its totient is φ = 44681472.

The previous prime is 91805963. The next prime is 91805969. The reversal of 91805968 is 86950819.

91805968 is nontrivially palindromic in base 7.

It is not an unprimeable number, because it can be changed into a prime (91805963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96471 + ... + 97417.

Almost surely, 2^91805968 is an apocalyptic number.

It is an amenable number.

91805968 is a deficient number, since it is larger than the sum of its proper divisors (90869840).

91805968 is a wasteful number, since it uses less digits than its factorization.

91805968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111 (or 1105 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 91805968 is about 9581.5430907553. The cubic root of 91805968 is about 451.1181543025.

The spelling of 91805968 in words is "ninety-one million, eight hundred five thousand, nine hundred sixty-eight".