113647979 has 4 divisors (see below), whose sum is σ = 116719584. Its totient is φ = 110576376.

The previous prime is 113647967. The next prime is 113648027. The reversal of 113647979 is 979746311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979746311 = 1471 ⋅666041.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113647979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113607979) 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, 1535747 + ... + 1535820.

It is an arithmetic number, because the mean of its divisors is an integer number (29179896).

Almost surely, 2^113647979 is an apocalyptic number.

113647979 is a deficient number, since it is larger than the sum of its proper divisors (3071605).

113647979 is an equidigital number, since it uses as much as digits as its factorization.

113647979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3071604.

The product of its digits is 285768, while the sum is 47.

The square root of 113647979 is about 10660.5806127059. The cubic root of 113647979 is about 484.3811556568.

The spelling of 113647979 in words is "one hundred thirteen million, six hundred forty-seven thousand, nine hundred seventy-nine".