2139705879 has 12 divisors (see below), whose sum is σ = 2914942584. Its totient is φ = 1396115824.

The previous prime is 2139705863. The next prime is 2139705941. The reversal of 2139705879 is 9785079312.

It is not a de Polignac number, because 2139705879 - 2⁴ = 2139705863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139705809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154812 + ... + 168065.

It is an arithmetic number, because the mean of its divisors is an integer number (242911882).

Almost surely, 2^2139705879 is an apocalyptic number.

2139705879 is a deficient number, since it is larger than the sum of its proper divisors (775236705).

2139705879 is an equidigital number, since it uses as much as digits as its factorization.

2139705879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322974 (or 322927 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 2139705879 is about 46256.9549257190. The cubic root of 2139705879 is about 1288.5997022051.

The spelling of 2139705879 in words is "two billion, one hundred thirty-nine million, seven hundred five thousand, eight hundred seventy-nine".