2168474879 has 4 divisors (see below), whose sum is σ = 2168914176. Its totient is φ = 2168035584.

The previous prime is 2168474863. The next prime is 2168474881. The reversal of 2168474879 is 9784748612.

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

It is a cyclic number.

It is not a de Polignac number, because 2168474879 - 2⁴ = 2168474863 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 (2168476879) 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, 212159 + ... + 222144.

It is an arithmetic number, because the mean of its divisors is an integer number (542228544).

Almost surely, 2^2168474879 is an apocalyptic number.

2168474879 is a deficient number, since it is larger than the sum of its proper divisors (439297).

2168474879 is an equidigital number, since it uses as much as digits as its factorization.

2168474879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439296.

The product of its digits is 5419008, while the sum is 56.

The square root of 2168474879 is about 46566.8860779846. The cubic root of 2168474879 is about 1294.3492164007.

The spelling of 2168474879 in words is "two billion, one hundred sixty-eight million, four hundred seventy-four thousand, eight hundred seventy-nine".