111987922 has 4 divisors (see below), whose sum is σ = 167981886. Its totient is φ = 55993960.

The previous prime is 111987907. The next prime is 111987923. The reversal of 111987922 is 229789111.

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., 61136761 + 50851161 = 7819^2 + 7131^2 .

It is not an unprimeable number, because it can be changed into a prime (111987923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27996979 + ... + 27996982.

Almost surely, 2^111987922 is an apocalyptic number.

111987922 is a deficient number, since it is larger than the sum of its proper divisors (55993964).

111987922 is an equidigital number, since it uses as much as digits as its factorization.

111987922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55993963.

The product of its digits is 18144, while the sum is 40.

The square root of 111987922 is about 10582.4345970103. The cubic root of 111987922 is about 482.0111250108.

The spelling of 111987922 in words is "one hundred eleven million, nine hundred eighty-seven thousand, nine hundred twenty-two".