91437113 has 4 divisors (see below), whose sum is σ = 91655760. Its totient is φ = 91218468.

The previous prime is 91437103. The next prime is 91437127. The reversal of 91437113 is 31173419.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91437113 - 2⁴ = 91437097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91437103) 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, 108695 + ... + 109532.

It is an arithmetic number, because the mean of its divisors is an integer number (22913940).

Almost surely, 2^91437113 is an apocalyptic number.

It is an amenable number.

91437113 is a deficient number, since it is larger than the sum of its proper divisors (218647).

91437113 is a wasteful number, since it uses less digits than its factorization.

91437113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218646.

The product of its digits is 2268, while the sum is 29.

The square root of 91437113 is about 9562.2755137049. The cubic root of 91437113 is about 450.5131808004.

The spelling of 91437113 in words is "ninety-one million, four hundred thirty-seven thousand, one hundred thirteen".