91261317 has 16 divisors (see below), whose sum is σ = 140084352. Its totient is φ = 51767040.

The previous prime is 91261301. The next prime is 91261319. The reversal of 91261317 is 71316219.

It is not a de Polignac number, because 91261317 - 2⁴ = 91261301 is a prime.

It is a super-4 number, since 4×91261317⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91261319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12984 + ... + 18737.

It is an arithmetic number, because the mean of its divisors is an integer number (8755272).

Almost surely, 2^91261317 is an apocalyptic number.

It is an amenable number.

91261317 is a deficient number, since it is larger than the sum of its proper divisors (48823035).

91261317 is a wasteful number, since it uses less digits than its factorization.

91261317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31868.

The product of its digits is 2268, while the sum is 30.

The square root of 91261317 is about 9553.0789277594. The cubic root of 91261317 is about 450.2242783254.

The spelling of 91261317 in words is "ninety-one million, two hundred sixty-one thousand, three hundred seventeen".