91312092 has 18 divisors (see below), whose sum is σ = 230816768. Its totient is φ = 30437352.

The previous prime is 91312087. The next prime is 91312099. The reversal of 91312092 is 29021319.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91312099) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1268188 + ... + 1268259.

Almost surely, 2^91312092 is an apocalyptic number.

It is an amenable number.

91312092 is an abundant number, since it is smaller than the sum of its proper divisors (139504676).

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

91312092 is a wasteful number, since it uses less digits than its factorization.

91312092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536457 (or 2536452 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 91312092 is about 9555.7360783981. The cubic root of 91312092 is about 450.3077598421.

The spelling of 91312092 in words is "ninety-one million, three hundred twelve thousand, ninety-two".