2159238979 has 4 divisors (see below), whose sum is σ = 2159335584. Its totient is φ = 2159142376.

The previous prime is 2159238973. The next prime is 2159239153. The reversal of 2159238979 is 9798329512.

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 not a de Polignac number, because 2159238979 - 2³ = 2159238971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2159238971) 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, 4374 + ... + 65860.

It is an arithmetic number, because the mean of its divisors is an integer number (539833896).

Almost surely, 2^2159238979 is an apocalyptic number.

2159238979 is a deficient number, since it is larger than the sum of its proper divisors (96605).

2159238979 is an equidigital number, since it uses as much as digits as its factorization.

2159238979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96604.

The product of its digits is 2449440, while the sum is 55.

The square root of 2159238979 is about 46467.6121508304. The cubic root of 2159238979 is about 1292.5089841457.

The spelling of 2159238979 in words is "two billion, one hundred fifty-nine million, two hundred thirty-eight thousand, nine hundred seventy-nine".