91022912 has 28 divisors (see below), whose sum is σ = 181689756. Its totient is φ = 45242880.

The previous prime is 91022887. The next prime is 91022927. The reversal of 91022912 is 21922019.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 84345856 + 6677056 = 9184^2 + 2584^2 .

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

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, 6962 + ... + 15182.

Almost surely, 2^91022912 is an apocalyptic number.

It is an amenable number.

91022912 is a deficient number, since it is larger than the sum of its proper divisors (90666844).

91022912 is a wasteful number, since it uses less digits than its factorization.

91022912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8406 (or 8396 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 91022912 is about 9540.5928536963. The cubic root of 91022912 is about 449.8318911160.

The spelling of 91022912 in words is "ninety-one million, twenty-two thousand, nine hundred twelve".