2439317561 has 2 divisors, whose sum is σ = 2439317562. Its totient is φ = 2439317560.

The previous prime is 2439317549. The next prime is 2439317563. The reversal of 2439317561 is 1657139342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2352250000 + 87067561 = 48500^2 + 9331^2 .

It is a cyclic number.

It is not a de Polignac number, because 2439317561 - 2¹⁴ = 2439301177 is a prime.

Together with 2439317563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2439317563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1219658780 + 1219658781.

It is an arithmetic number, because the mean of its divisors is an integer number (1219658781).

Almost surely, 2^2439317561 is an apocalyptic number.

It is an amenable number.

2439317561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2439317561 is an equidigital number, since it uses as much as digits as its factorization.

2439317561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 41.

The square root of 2439317561 is about 49389.4478709775. The cubic root of 2439317561 is about 1346.1375764872.

The spelling of 2439317561 in words is "two billion, four hundred thirty-nine million, three hundred seventeen thousand, five hundred sixty-one".