111979711 has 8 divisors (see below), whose sum is σ = 119199600. Its totient is φ = 104892480.

The previous prime is 111979687. The next prime is 111979727. The reversal of 111979711 is 117979111.

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-111979711 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 (111979771) 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 7 ways as a sum of consecutive naturals, for example, 31420 + ... + 34801.

It is an arithmetic number, because the mean of its divisors is an integer number (14899950).

Almost surely, 2^111979711 is an apocalyptic number.

111979711 is a deficient number, since it is larger than the sum of its proper divisors (7219889).

111979711 is an equidigital number, since it uses as much as digits as its factorization.

111979711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66329.

The product of its digits is 3969, while the sum is 37.

The square root of 111979711 is about 10582.0466356939. The cubic root of 111979711 is about 481.9993443056. Note that the first 3 decimals are identical.

The spelling of 111979711 in words is "one hundred eleven million, nine hundred seventy-nine thousand, seven hundred eleven".