91613717 has 6 divisors (see below), whose sum is σ = 99203202. Its totient is φ = 84566352.

The previous prime is 91613701. The next prime is 91613747. The reversal of 91613717 is 71731619.

It can be written as a sum of positive squares in 3 ways, for example, as 2669956 + 88943761 = 1634^2 + 9431^2 .

It is not a de Polignac number, because 91613717 - 2⁴ = 91613701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91613747) 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, 270878 + ... + 271215.

It is an arithmetic number, because the mean of its divisors is an integer number (16533867).

Almost surely, 2^91613717 is an apocalyptic number.

It is an amenable number.

91613717 is a deficient number, since it is larger than the sum of its proper divisors (7589485).

91613717 is a wasteful number, since it uses less digits than its factorization.

91613717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542119 (or 542106 counting only the distinct ones).

The product of its digits is 7938, while the sum is 35.

The square root of 91613717 is about 9571.5054719725. The cubic root of 91613717 is about 450.8030385291.

The spelling of 91613717 in words is "ninety-one million, six hundred thirteen thousand, seven hundred seventeen".