91092868 has 12 divisors (see below), whose sum is σ = 168789852. Its totient is φ = 42867200.

The previous prime is 91092823. The next prime is 91092871. The reversal of 91092868 is 86829019.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56070144 + 35022724 = 7488^2 + 5918^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669733 + ... + 669868.

It is an arithmetic number, because the mean of its divisors is an integer number (14065821).

Almost surely, 2^91092868 is an apocalyptic number.

It is an amenable number.

91092868 is a deficient number, since it is larger than the sum of its proper divisors (77696984).

91092868 is a wasteful number, since it uses less digits than its factorization.

91092868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339622 (or 1339620 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 91092868 is about 9544.2583787322. The cubic root of 91092868 is about 449.9471016009.

The spelling of 91092868 in words is "ninety-one million, ninety-two thousand, eight hundred sixty-eight".