111981874 has 4 divisors (see below), whose sum is σ = 167972814. Its totient is φ = 55990936.

The previous prime is 111981853. The next prime is 111981901. The reversal of 111981874 is 478189111.

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

It can be written as a sum of positive squares in only one way, i.e., 82355625 + 29626249 = 9075^2 + 5443^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27995467 + ... + 27995470.

Almost surely, 2^111981874 is an apocalyptic number.

111981874 is a deficient number, since it is larger than the sum of its proper divisors (55990940).

111981874 is an equidigital number, since it uses as much as digits as its factorization.

111981874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55990939.

The product of its digits is 16128, while the sum is 40.

The square root of 111981874 is about 10582.1488366021. The cubic root of 111981874 is about 482.0024477186.

The spelling of 111981874 in words is "one hundred eleven million, nine hundred eighty-one thousand, eight hundred seventy-four".