91089922 has 24 divisors (see below), whose sum is σ = 173394000. Its totient is φ = 35489160.

The previous prime is 91089853. The next prime is 91089937. The reversal of 91089922 is 22998019.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41172 + ... + 43327.

It is an arithmetic number, because the mean of its divisors is an integer number (7224750).

Almost surely, 2^91089922 is an apocalyptic number.

91089922 is a deficient number, since it is larger than the sum of its proper divisors (82304078).

91089922 is a wasteful number, since it uses less digits than its factorization.

91089922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84526 (or 84519 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 91089922 is about 9544.1040438587. The cubic root of 91089922 is about 449.9422510255.

The spelling of 91089922 in words is "ninety-one million, eighty-nine thousand, nine hundred twenty-two".