6389725739 has 8 divisors (see below), whose sum is σ = 6661690992. Its totient is φ = 6123368160.

The previous prime is 6389725687. The next prime is 6389725751. The reversal of 6389725739 is 9375279836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6389725739 is a prime.

It is a super-2 number, since 2×6389725739² = 81657190039278192242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6389725789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1399592 + ... + 1404149.

It is an arithmetic number, because the mean of its divisors is an integer number (832711374).

Almost surely, 2^6389725739 is an apocalyptic number.

6389725739 is a deficient number, since it is larger than the sum of its proper divisors (271965253).

6389725739 is a wasteful number, since it uses less digits than its factorization.

6389725739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803837.

The product of its digits is 17146080, while the sum is 59.

The square root of 6389725739 is about 79935.7600764514. The cubic root of 6389725739 is about 1855.6414826724.

The spelling of 6389725739 in words is "six billion, three hundred eighty-nine million, seven hundred twenty-five thousand, seven hundred thirty-nine".