111987923 has 2 divisors, whose sum is σ = 111987924. Its totient is φ = 111987922.

The previous prime is 111987907. The next prime is 111987973. The reversal of 111987923 is 329789111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111987923 - 2⁴ = 111987907 is a prime.

It is not a weakly prime, because it can be changed into another prime (111987973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55993961 + 55993962.

It is an arithmetic number, because the mean of its divisors is an integer number (55993962).

Almost surely, 2^111987923 is an apocalyptic number.

111987923 is a deficient number, since it is larger than the sum of its proper divisors (1).

111987923 is an equidigital number, since it uses as much as digits as its factorization.

111987923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 41.

The square root of 111987923 is about 10582.4346442584. The cubic root of 111987923 is about 482.0111264455.

The spelling of 111987923 in words is "one hundred eleven million, nine hundred eighty-seven thousand, nine hundred twenty-three".