91798965 has 12 divisors (see below), whose sum is σ = 159118284. Its totient is φ = 48959424.

The previous prime is 91798939. The next prime is 91798981. The reversal of 91798965 is 56989719.

It can be written as a sum of positive squares in 2 ways, for example, as 65512836 + 26286129 = 8094^2 + 5127^2 .

It is not a de Polignac number, because 91798965 - 2⁶ = 91798901 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1019944 + ... + 1020033.

It is an arithmetic number, because the mean of its divisors is an integer number (13259857).

Almost surely, 2^91798965 is an apocalyptic number.

It is an amenable number.

91798965 is a deficient number, since it is larger than the sum of its proper divisors (67319319).

91798965 is a wasteful number, since it uses less digits than its factorization.

91798965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039988 (or 2039985 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 91798965 is about 9581.1776416054. The cubic root of 91798965 is about 451.1066835132.

The spelling of 91798965 in words is "ninety-one million, seven hundred ninety-eight thousand, nine hundred sixty-five".