113718409 has 4 divisors (see below), whose sum is σ = 129963904. Its totient is φ = 97472916.

The previous prime is 113718403. The next prime is 113718413. The reversal of 113718409 is 904817311.

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, and also an emirpimes, since its reverse is a distinct semiprime: 904817311 = 443 ⋅2042477.

It is a cyclic number.

It is not a de Polignac number, because 113718409 - 2⁵ = 113718377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (113718403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8122737 + ... + 8122750.

It is an arithmetic number, because the mean of its divisors is an integer number (32490976).

Almost surely, 2^113718409 is an apocalyptic number.

It is an amenable number.

113718409 is a deficient number, since it is larger than the sum of its proper divisors (16245495).

113718409 is an equidigital number, since it uses as much as digits as its factorization.

113718409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16245494.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 113718409 is about 10663.8833920856. The cubic root of 113718409 is about 484.4811953298.

The spelling of 113718409 in words is "one hundred thirteen million, seven hundred eighteen thousand, four hundred nine".