91013412 has 48 divisors (see below), whose sum is σ = 243169920. Its totient is φ = 25953792.

The previous prime is 91013411. The next prime is 91013443. The reversal of 91013412 is 21431019.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (91013411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81514 + ... + 82622.

It is an arithmetic number, because the mean of its divisors is an integer number (5066040).

Almost surely, 2^91013412 is an apocalyptic number.

It is an amenable number.

91013412 is an abundant number, since it is smaller than the sum of its proper divisors (152156508).

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

91013412 is a wasteful number, since it uses less digits than its factorization.

91013412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100 (or 2098 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 91013412 is about 9540.0949680808. The cubic root of 91013412 is about 449.8162410210.

The spelling of 91013412 in words is "ninety-one million, thirteen thousand, four hundred twelve".