111968889 has 4 divisors (see below), whose sum is σ = 149291856. Its totient is φ = 74645924.

The previous prime is 111968873. The next prime is 111968891. The reversal of 111968889 is 988869111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111968889 - 2⁴ = 111968873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111968819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18661479 + ... + 18661484.

It is an arithmetic number, because the mean of its divisors is an integer number (37322964).

Almost surely, 2^111968889 is an apocalyptic number.

It is an amenable number.

111968889 is a deficient number, since it is larger than the sum of its proper divisors (37322967).

111968889 is an equidigital number, since it uses as much as digits as its factorization.

111968889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37322966.

The product of its digits is 248832, while the sum is 51.

The square root of 111968889 is about 10581.5352855812. The cubic root of 111968889 is about 481.9838165971.

The spelling of 111968889 in words is "one hundred eleven million, nine hundred sixty-eight thousand, eight hundred eighty-nine".