91123912 has 16 divisors (see below), whose sum is σ = 186390000. Its totient is φ = 41419920.

The previous prime is 91123883. The next prime is 91123913. The reversal of 91123912 is 21932119.

It is not an unprimeable number, because it can be changed into a prime (91123913) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 517662 + ... + 517837.

It is an arithmetic number, because the mean of its divisors is an integer number (11649375).

Almost surely, 2^91123912 is an apocalyptic number.

It is an amenable number.

91123912 is an abundant number, since it is smaller than the sum of its proper divisors (95266088).

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

91123912 is a wasteful number, since it uses less digits than its factorization.

91123912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035516 (or 1035512 counting only the distinct ones).

The product of its digits is 972, while the sum is 28.

The square root of 91123912 is about 9545.8845582796. The cubic root of 91123912 is about 449.9982090464.

The spelling of 91123912 in words is "ninety-one million, one hundred twenty-three thousand, nine hundred twelve".