111544979 has 8 divisors (see below), whose sum is σ = 137286240. Its totient is φ = 88255296.

The previous prime is 111544903. The next prime is 111544981. The reversal of 111544979 is 979445111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111544979 is a prime.

It is a super-2 number, since 2×111544979² = 24884564680220882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111543979) 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, 612794 + ... + 612975.

It is an arithmetic number, because the mean of its divisors is an integer number (17160780).

Almost surely, 2^111544979 is an apocalyptic number.

111544979 is a deficient number, since it is larger than the sum of its proper divisors (25741261).

111544979 is a wasteful number, since it uses less digits than its factorization.

111544979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225789.

The product of its digits is 45360, while the sum is 41.

The square root of 111544979 is about 10561.4856436015. The cubic root of 111544979 is about 481.3747898347.

The spelling of 111544979 in words is "one hundred eleven million, five hundred forty-four thousand, nine hundred seventy-nine".