91307712 has 56 divisors (see below), whose sum is σ = 248133616. Its totient is φ = 29611008.

The previous prime is 91307707. The next prime is 91307717. The reversal of 91307712 is 21770319.

It is an interprime number because it is at equal distance from previous prime (91307707) and next prime (91307717).

It is a self number, because there is not a number n which added to its sum of digits gives 91307712.

It is not an unprimeable number, because it can be changed into a prime (91307717) 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 7 ways as a sum of consecutive naturals, for example, 678 + ... + 13530.

Almost surely, 2^91307712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91307712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124066808).

91307712 is an abundant number, since it is smaller than the sum of its proper divisors (156825904).

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

91307712 is a wasteful number, since it uses less digits than its factorization.

91307712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12905 (or 12895 counting only the distinct ones).

The product of its (nonzero) digits is 2646, while the sum is 30.

The square root of 91307712 is about 9555.5068939329. The cubic root of 91307712 is about 450.3005597022.

The spelling of 91307712 in words is "ninety-one million, three hundred seven thousand, seven hundred twelve".