111172979 has 8 divisors (see below), whose sum is σ = 121772160. Its totient is φ = 101024896.

The previous prime is 111172973. The next prime is 111172981. The reversal of 111172979 is 979271111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111172979 - 2²⁰ = 110124403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111172973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112259 + ... + 113244.

It is an arithmetic number, because the mean of its divisors is an integer number (15221520).

Almost surely, 2^111172979 is an apocalyptic number.

111172979 is a deficient number, since it is larger than the sum of its proper divisors (10599181).

111172979 is a wasteful number, since it uses less digits than its factorization.

111172979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225549.

The product of its digits is 7938, while the sum is 38.

The square root of 111172979 is about 10543.8597771404. The cubic root of 111172979 is about 480.8390691492.

The spelling of 111172979 in words is "one hundred eleven million, one hundred seventy-two thousand, nine hundred seventy-nine".