2188858979 has 4 divisors (see below), whose sum is σ = 2221528584. Its totient is φ = 2156189376.

The previous prime is 2188858967. The next prime is 2188858981. The reversal of 2188858979 is 9798588812.

2188858979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-2188858979 is a prime.

It is a super-2 number, since 2×2188858979² = 9582207259897844882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2188858939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16334702 + ... + 16334835.

It is an arithmetic number, because the mean of its divisors is an integer number (555382146).

Almost surely, 2^2188858979 is an apocalyptic number.

2188858979 is a deficient number, since it is larger than the sum of its proper divisors (32669605).

2188858979 is an equidigital number, since it uses as much as digits as its factorization.

2188858979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32669604.

The product of its digits is 23224320, while the sum is 65.

The square root of 2188858979 is about 46785.2431755997. The cubic root of 2188858979 is about 1298.3922884978.

The spelling of 2188858979 in words is "two billion, one hundred eighty-eight million, eight hundred fifty-eight thousand, nine hundred seventy-nine".