91797966 has 24 divisors (see below), whose sum is σ = 214195800. Its totient is φ = 28245456.

The previous prime is 91797931. The next prime is 91797967. The reversal of 91797966 is 66979719.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91797967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195916 + ... + 196383.

It is an arithmetic number, because the mean of its divisors is an integer number (8924825).

Almost surely, 2^91797966 is an apocalyptic number.

91797966 is an abundant number, since it is smaller than the sum of its proper divisors (122397834).

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

91797966 is a wasteful number, since it uses less digits than its factorization.

91797966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392320 (or 392317 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 91797966 is about 9581.1255079975. The cubic root of 91797966 is about 451.1050471214.

The spelling of 91797966 in words is "ninety-one million, seven hundred ninety-seven thousand, nine hundred sixty-six".