91312902 has 12 divisors (see below), whose sum is σ = 197844660. Its totient is φ = 30437628.

The previous prime is 91312901. The next prime is 91312919. The reversal of 91312902 is 20921319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91312901) 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, 2536452 + ... + 2536487.

It is an arithmetic number, because the mean of its divisors is an integer number (16487055).

Almost surely, 2^91312902 is an apocalyptic number.

91312902 is an abundant number, since it is smaller than the sum of its proper divisors (106531758).

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

91312902 is a wasteful number, since it uses less digits than its factorization.

91312902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5072947 (or 5072944 counting only the distinct ones).

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

The square root of 91312902 is about 9555.7784612244. The cubic root of 91312902 is about 450.3090913496.

The spelling of 91312902 in words is "ninety-one million, three hundred twelve thousand, nine hundred two".