91317136 has 15 divisors (see below), whose sum is σ = 177001041. Its totient is φ = 45639456.

The previous prime is 91317133. The next prime is 91317139. The reversal of 91317136 is 63171319.

The square root of 91317136 is 9556.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (91317133) and next prime (91317139).

It can be written as a sum of positive squares in only one way, i.e., 20757136 + 70560000 = 4556^2 + 8400^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91317098 and 91317107.

It is not an unprimeable number, because it can be changed into a prime (91317131) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 37030 + ... + 39418.

Almost surely, 2^91317136 is an apocalyptic number.

91317136 is the 9556-th square number.

It is an amenable number.

91317136 is a deficient number, since it is larger than the sum of its proper divisors (85683905).

91317136 is an frugal number, since it uses more digits than its factorization.

91317136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4786 (or 2391 counting only the distinct ones).

The product of its digits is 3402, while the sum is 31.

The cubic root of 91317136 is about 450.3160512249.

The spelling of 91317136 in words is "ninety-one million, three hundred seventeen thousand, one hundred thirty-six".