2168843979 has 16 divisors (see below), whose sum is σ = 2997596160. Its totient is φ = 1393385280.

The previous prime is 2168843879. The next prime is 2168843983. The reversal of 2168843979 is 9793488612.

2168843979 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2168843979 - 2¹³ = 2168835787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2168843779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26562 + ... + 71015.

It is an arithmetic number, because the mean of its divisors is an integer number (187349760).

Almost surely, 2^2168843979 is an apocalyptic number.

2168843979 is a deficient number, since it is larger than the sum of its proper divisors (828752181).

2168843979 is a wasteful number, since it uses less digits than its factorization.

2168843979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97850.

The product of its digits is 5225472, while the sum is 57.

The square root of 2168843979 is about 46570.8490259733. The cubic root of 2168843979 is about 1294.4226500686.

The spelling of 2168843979 in words is "two billion, one hundred sixty-eight million, eight hundred forty-three thousand, nine hundred seventy-nine".