111917998 has 32 divisors (see below), whose sum is σ = 178790400. Its totient is φ = 52462080.

The previous prime is 111917983. The next prime is 111918011. The reversal of 111917998 is 899719111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 562303 + ... + 562501.

It is an arithmetic number, because the mean of its divisors is an integer number (5587200).

Almost surely, 2^111917998 is an apocalyptic number.

111917998 is a deficient number, since it is larger than the sum of its proper divisors (66872402).

111917998 is a wasteful number, since it uses less digits than its factorization.

111917998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472.

The product of its digits is 40824, while the sum is 46.

The square root of 111917998 is about 10579.1303045194. The cubic root of 111917998 is about 481.9107833473.

The spelling of 111917998 in words is "one hundred eleven million, nine hundred seventeen thousand, nine hundred ninety-eight".