6393937439 has 12 divisors (see below), whose sum is σ = 6907315800. Its totient is φ = 5915810688.

The previous prime is 6393937409. The next prime is 6393937441. The reversal of 6393937439 is 9347393936.

It is not a de Polignac number, because 6393937439 - 2²⁰ = 6392888863 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 (6393937409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170444 + ... + 204545.

It is an arithmetic number, because the mean of its divisors is an integer number (575609650).

Almost surely, 2^6393937439 is an apocalyptic number.

6393937439 is a deficient number, since it is larger than the sum of its proper divisors (513378361).

6393937439 is a wasteful number, since it uses less digits than its factorization.

6393937439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375082 (or 375065 counting only the distinct ones).

The product of its digits is 9920232, while the sum is 56.

The square root of 6393937439 is about 79962.1000161952. The cubic root of 6393937439 is about 1856.0490999965.

The spelling of 6393937439 in words is "six billion, three hundred ninety-three million, nine hundred thirty-seven thousand, four hundred thirty-nine".