111890708879 has 4 divisors (see below), whose sum is σ = 111891435480. Its totient is φ = 111889982280.

The previous prime is 111890708857. The next prime is 111890708893. The reversal of 111890708879 is 978807098111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111890708879 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 (111890708849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30992 + ... + 474069.

It is an arithmetic number, because the mean of its divisors is an integer number (27972858870).

Almost surely, 2^111890708879 is an apocalyptic number.

111890708879 is a deficient number, since it is larger than the sum of its proper divisors (726601).

111890708879 is an equidigital number, since it uses as much as digits as its factorization.

111890708879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726600.

The product of its (nonzero) digits is 2032128, while the sum is 59.

The spelling of 111890708879 in words is "one hundred eleven billion, eight hundred ninety million, seven hundred eight thousand, eight hundred seventy-nine".