2659391139 has 4 divisors (see below), whose sum is σ = 3545854856. Its totient is φ = 1772927424.

The previous prime is 2659391117. The next prime is 2659391143. The reversal of 2659391139 is 9311939562.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2659391139 - 2¹¹ = 2659389091 is a prime.

It is a super-2 number, since 2×2659391139² = 14144722460383434642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2659391149) 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, 443231854 + ... + 443231859.

It is an arithmetic number, because the mean of its divisors is an integer number (886463714).

Almost surely, 2^2659391139 is an apocalyptic number.

2659391139 is a deficient number, since it is larger than the sum of its proper divisors (886463717).

2659391139 is an equidigital number, since it uses as much as digits as its factorization.

2659391139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886463716.

The product of its digits is 393660, while the sum is 48.

The square root of 2659391139 is about 51569.2848408818. The cubic root of 2659391139 is about 1385.4602577416.

The spelling of 2659391139 in words is "two billion, six hundred fifty-nine million, three hundred ninety-one thousand, one hundred thirty-nine".