5684639839 has 4 divisors (see below), whose sum is σ = 5687350200. Its totient is φ = 5681929480.

The previous prime is 5684639813. The next prime is 5684639869. The reversal of 5684639839 is 9389364865.

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

It is a cyclic number.

It is not a de Polignac number, because 5684639839 - 2⁹ = 5684639327 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 (5684639869) 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, 1352032 + ... + 1356229.

It is an arithmetic number, because the mean of its divisors is an integer number (1421837550).

Almost surely, 2^5684639839 is an apocalyptic number.

5684639839 is a deficient number, since it is larger than the sum of its proper divisors (2710361).

5684639839 is a wasteful number, since it uses less digits than its factorization.

5684639839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710360.

The product of its digits is 33592320, while the sum is 61.

The square root of 5684639839 is about 75396.5505775961. The cubic root of 5684639839 is about 1784.7099769160.

The spelling of 5684639839 in words is "five billion, six hundred eighty-four million, six hundred thirty-nine thousand, eight hundred thirty-nine".