111978967 has 4 divisors (see below), whose sum is σ = 112173616. Its totient is φ = 111784320.

The previous prime is 111978959. The next prime is 111979061. The reversal of 111978967 is 769879111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111978967 - 2³ = 111978959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111978967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111978067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96459 + ... + 97612.

It is an arithmetic number, because the mean of its divisors is an integer number (28043404).

Almost surely, 2^111978967 is an apocalyptic number.

111978967 is a deficient number, since it is larger than the sum of its proper divisors (194649).

111978967 is an equidigital number, since it uses as much as digits as its factorization.

111978967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194648.

The product of its digits is 190512, while the sum is 49.

The square root of 111978967 is about 10582.0114817553. The cubic root of 111978967 is about 481.9982768256.

It can be divided in two parts, 11197 and 8967, that added together give a square (20164 = 142²).

The spelling of 111978967 in words is "one hundred eleven million, nine hundred seventy-eight thousand, nine hundred sixty-seven".