2139458239 has 2 divisors, whose sum is σ = 2139458240. Its totient is φ = 2139458238.

The previous prime is 2139458221. The next prime is 2139458263. The reversal of 2139458239 is 9328549312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2139458239 - 2¹⁵ = 2139425471 is a prime.

It is a super-2 number, since 2×2139458239² = 9154563112849962242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2139458339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069729119 + 1069729120.

It is an arithmetic number, because the mean of its divisors is an integer number (1069729120).

Almost surely, 2^2139458239 is an apocalyptic number.

2139458239 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139458239 is an equidigital number, since it uses as much as digits as its factorization.

2139458239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 46.

The square root of 2139458239 is about 46254.2780616020. The cubic root of 2139458239 is about 1288.5499880294.

The spelling of 2139458239 in words is "two billion, one hundred thirty-nine million, four hundred fifty-eight thousand, two hundred thirty-nine".