91437713 has 4 divisors (see below), whose sum is σ = 96816420. Its totient is φ = 86059008.

The previous prime is 91437707. The next prime is 91437721. The reversal of 91437713 is 31773419.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36336784 + 55100929 = 6028^2 + 7423^2 .

It is a cyclic number.

It is not a de Polignac number, because 91437713 - 2⁶ = 91437649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91437733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2689328 + ... + 2689361.

It is an arithmetic number, because the mean of its divisors is an integer number (24204105).

Almost surely, 2^91437713 is an apocalyptic number.

It is an amenable number.

91437713 is a deficient number, since it is larger than the sum of its proper divisors (5378707).

91437713 is a wasteful number, since it uses less digits than its factorization.

91437713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5378706.

The product of its digits is 15876, while the sum is 35.

The square root of 91437713 is about 9562.3068869389. The cubic root of 91437713 is about 450.5141662037.

The spelling of 91437713 in words is "ninety-one million, four hundred thirty-seven thousand, seven hundred thirteen".