113512391 has 4 divisors (see below), whose sum is σ = 113809152. Its totient is φ = 113215632.

The previous prime is 113512387. The next prime is 113512397. The reversal of 113512391 is 193215311.

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

It is a cyclic number.

It is not a de Polignac number, because 113512391 - 2² = 113512387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113512391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113512397) 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, 147806 + ... + 148571.

It is an arithmetic number, because the mean of its divisors is an integer number (28452288).

Almost surely, 2^113512391 is an apocalyptic number.

113512391 is a deficient number, since it is larger than the sum of its proper divisors (296761).

113512391 is an equidigital number, since it uses as much as digits as its factorization.

113512391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296760.

The product of its digits is 810, while the sum is 26.

The square root of 113512391 is about 10654.2193989048. The cubic root of 113512391 is about 484.1884482913.

The spelling of 113512391 in words is "one hundred thirteen million, five hundred twelve thousand, three hundred ninety-one".