2149566839 has 6 divisors (see below), whose sum is σ = 2500516584. Its totient is φ = 1842485820.

The previous prime is 2149566803. The next prime is 2149566841. The reversal of 2149566839 is 9386659412.

2149566839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-2149566839 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 (2149566889) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21934307 + ... + 21934404.

It is an arithmetic number, because the mean of its divisors is an integer number (416752764).

Almost surely, 2^2149566839 is an apocalyptic number.

2149566839 is a deficient number, since it is larger than the sum of its proper divisors (350949745).

2149566839 is an equidigital number, since it uses as much as digits as its factorization.

2149566839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43868725 (or 43868718 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 53.

The square root of 2149566839 is about 46363.4213470059. The cubic root of 2149566839 is about 1290.5761981355.

The spelling of 2149566839 in words is "two billion, one hundred forty-nine million, five hundred sixty-six thousand, eight hundred thirty-nine".