91713312 has 144 divisors (see below), whose sum is σ = 275184000. Its totient is φ = 28933632.

The previous prime is 91713311. The next prime is 91713313. The reversal of 91713312 is 21331719.

It is an interprime number because it is at equal distance from previous prime (91713311) and next prime (91713313).

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×91713312² = 16822663196018688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91713311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 659739 + ... + 659877.

It is an arithmetic number, because the mean of its divisors is an integer number (1911000).

Almost surely, 2^91713312 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 91713312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137592000).

91713312 is an abundant number, since it is smaller than the sum of its proper divisors (183470688).

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

91713312 is a wasteful number, since it uses less digits than its factorization.

91713312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 252 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 91713312 is about 9576.7067408374. The cubic root of 91713312 is about 450.9663381972.

The spelling of 91713312 in words is "ninety-one million, seven hundred thirteen thousand, three hundred twelve".