91313136 has 40 divisors (see below), whose sum is σ = 262103760. Its totient is φ = 30437568.

The previous prime is 91313113. The next prime is 91313143. The reversal of 91313136 is 63131319.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105255 + ... + 106118.

It is an arithmetic number, because the mean of its divisors is an integer number (6552594).

Almost surely, 2^91313136 is an apocalyptic number.

It is an amenable number.

91313136 is an abundant number, since it is smaller than the sum of its proper divisors (170790624).

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

91313136 is a wasteful number, since it uses less digits than its factorization.

91313136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211390 (or 211378 counting only the distinct ones).

The product of its digits is 1458, while the sum is 27.

The square root of 91313136 is about 9555.7907051170. The cubic root of 91313136 is about 450.3094760059.

It can be divided in two parts, 9131313 and 6, that added together give a palindrome (9131319).

The spelling of 91313136 in words is "ninety-one million, three hundred thirteen thousand, one hundred thirty-six".