5239681913 has 4 divisors (see below), whose sum is σ = 5242481268. Its totient is φ = 5236882560.

The previous prime is 5239681901. The next prime is 5239681921. The reversal of 5239681913 is 3191869325.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1160560489 + 4079121424 = 34067^2 + 63868^2 .

It is a cyclic number.

It is not a de Polignac number, because 5239681913 - 2²⁴ = 5222904697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5239681943) 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, 1396868 + ... + 1400613.

It is an arithmetic number, because the mean of its divisors is an integer number (1310620317).

Almost surely, 2^5239681913 is an apocalyptic number.

It is an amenable number.

5239681913 is a deficient number, since it is larger than the sum of its proper divisors (2799355).

5239681913 is a wasteful number, since it uses less digits than its factorization.

5239681913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2799354.

The product of its digits is 349920, while the sum is 47.

The square root of 5239681913 is about 72385.6471477599. The cubic root of 5239681913 is about 1736.8739742717.

The spelling of 5239681913 in words is "five billion, two hundred thirty-nine million, six hundred eighty-one thousand, nine hundred thirteen".