6396838393 has 6 divisors (see below), whose sum is σ = 7031235722. Its totient is φ = 5815307520.

The previous prime is 6396838391. The next prime is 6396838397. The reversal of 6396838393 is 3938386936.

It can be written as a sum of positive squares in only one way, i.e., 6356553984 + 40284409 = 79728^2 + 6347^2 .

It is not a de Polignac number, because 6396838393 - 2¹ = 6396838391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6396838391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26433096 + ... + 26433337.

Almost surely, 2^6396838393 is an apocalyptic number.

It is an amenable number.

6396838393 is a deficient number, since it is larger than the sum of its proper divisors (634397329).

6396838393 is a wasteful number, since it uses less digits than its factorization.

6396838393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52866455 (or 52866444 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 58.

The square root of 6396838393 is about 79980.2375152762. The cubic root of 6396838393 is about 1856.3297564268.

The spelling of 6396838393 in words is "six billion, three hundred ninety-six million, eight hundred thirty-eight thousand, three hundred ninety-three".