111518979 has 32 divisors (see below), whose sum is σ = 175730688. Its totient is φ = 62016000.

The previous prime is 111518977. The next prime is 111518983. The reversal of 111518979 is 979815111.

It is not a de Polignac number, because 111518979 - 2¹ = 111518977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111518979.

It is not an unprimeable number, because it can be changed into a prime (111518977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81259 + ... + 82619.

It is an arithmetic number, because the mean of its divisors is an integer number (5491584).

Almost surely, 2^111518979 is an apocalyptic number.

111518979 is a deficient number, since it is larger than the sum of its proper divisors (64211709).

111518979 is a wasteful number, since it uses less digits than its factorization.

111518979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579.

The product of its digits is 22680, while the sum is 42.

The square root of 111518979 is about 10560.2546844288. The cubic root of 111518979 is about 481.3373857394.

The spelling of 111518979 in words is "one hundred eleven million, five hundred eighteen thousand, nine hundred seventy-nine".