111995973 has 16 divisors (see below), whose sum is σ = 166124800. Its totient is φ = 74571840.

The previous prime is 111995959. The next prime is 111996007. The reversal of 111995973 is 379599111.

It is a happy number.

It is not a de Polignac number, because 111995973 - 2⁹ = 111995461 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 (111995953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25188 + ... + 29298.

It is an arithmetic number, because the mean of its divisors is an integer number (10382800).

Almost surely, 2^111995973 is an apocalyptic number.

It is an amenable number.

111995973 is a deficient number, since it is larger than the sum of its proper divisors (54128827).

111995973 is a wasteful number, since it uses less digits than its factorization.

111995973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5129 (or 5123 counting only the distinct ones).

The product of its digits is 76545, while the sum is 45.

The square root of 111995973 is about 10582.8149846815. The cubic root of 111995973 is about 482.0226755974.

The spelling of 111995973 in words is "one hundred eleven million, nine hundred ninety-five thousand, nine hundred seventy-three".