113771979 has 16 divisors (see below), whose sum is σ = 170292640. Its totient is φ = 75064320.

The previous prime is 113771969. The next prime is 113771989. The reversal of 113771979 is 979177311.

It is an interprime number because it is at equal distance from previous prime (113771969) and next prime (113771989).

It is not a de Polignac number, because 113771979 - 2⁹ = 113771467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113771909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19102 + ... + 24339.

It is an arithmetic number, because the mean of its divisors is an integer number (10643290).

Almost surely, 2^113771979 is an apocalyptic number.

113771979 is a deficient number, since it is larger than the sum of its proper divisors (56520661).

113771979 is an equidigital number, since it uses as much as digits as its factorization.

113771979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43547 (or 43541 counting only the distinct ones).

The product of its digits is 83349, while the sum is 45.

The square root of 113771979 is about 10666.3948454949. The cubic root of 113771979 is about 484.5572591895.

The spelling of 113771979 in words is "one hundred thirteen million, seven hundred seventy-one thousand, nine hundred seventy-nine".