111947679 has 6 divisors (see below), whose sum is σ = 161702216. Its totient is φ = 74631780.

The previous prime is 111947663. The next prime is 111947701. The reversal of 111947679 is 976749111.

It is not a de Polignac number, because 111947679 - 2⁴ = 111947663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111947629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6219307 + ... + 6219324.

Almost surely, 2^111947679 is an apocalyptic number.

111947679 is a deficient number, since it is larger than the sum of its proper divisors (49754537).

111947679 is a wasteful number, since it uses less digits than its factorization.

111947679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12438637 (or 12438634 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 111947679 is about 10580.5330205997. The cubic root of 111947679 is about 481.9533809930.

The spelling of 111947679 in words is "one hundred eleven million, nine hundred forty-seven thousand, six hundred seventy-nine".