111158923 has 4 divisors (see below), whose sum is σ = 111970440. Its totient is φ = 110347408.

The previous prime is 111158893. The next prime is 111158951. The reversal of 111158923 is 329851111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111158923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111153923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405553 + ... + 405826.

It is an arithmetic number, because the mean of its divisors is an integer number (27992610).

Almost surely, 2^111158923 is an apocalyptic number.

111158923 is a deficient number, since it is larger than the sum of its proper divisors (811517).

111158923 is an equidigital number, since it uses as much as digits as its factorization.

111158923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811516.

The product of its digits is 2160, while the sum is 31.

The square root of 111158923 is about 10543.1932069938. The cubic root of 111158923 is about 480.8188035569.

The spelling of 111158923 in words is "one hundred eleven million, one hundred fifty-eight thousand, nine hundred twenty-three".