113979909 has 4 divisors (see below), whose sum is σ = 151973216. Its totient is φ = 75986604.

The previous prime is 113979907. The next prime is 113979911. The reversal of 113979909 is 909979311.

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: 909979311 = 3 ⋅303326437.

It is an interprime number because it is at equal distance from previous prime (113979907) and next prime (113979911).

It is not a de Polignac number, because 113979909 - 2¹ = 113979907 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 (113979907) 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, 18996649 + ... + 18996654.

It is an arithmetic number, because the mean of its divisors is an integer number (37993304).

Almost surely, 2^113979909 is an apocalyptic number.

It is an amenable number.

113979909 is a deficient number, since it is larger than the sum of its proper divisors (37993307).

113979909 is an equidigital number, since it uses as much as digits as its factorization.

113979909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37993306.

The product of its (nonzero) digits is 137781, while the sum is 48.

The square root of 113979909 is about 10676.1373632976. The cubic root of 113979909 is about 484.8522722926.

The spelling of 113979909 in words is "one hundred thirteen million, nine hundred seventy-nine thousand, nine hundred nine".