6389934539 has 2 divisors, whose sum is σ = 6389934540. Its totient is φ = 6389934538.

The previous prime is 6389934511. The next prime is 6389934553. The reversal of 6389934539 is 9354399836.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6389934539 is a prime.

It is not a weakly prime, because it can be changed into another prime (6389934139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3194967269 + 3194967270.

It is an arithmetic number, because the mean of its divisors is an integer number (3194967270).

Almost surely, 2^6389934539 is an apocalyptic number.

6389934539 is a deficient number, since it is larger than the sum of its proper divisors (1).

6389934539 is an equidigital number, since it uses as much as digits as its factorization.

6389934539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18895680, while the sum is 59.

The square root of 6389934539 is about 79937.0661145379. The cubic root of 6389934539 is about 1855.6616950016.

The spelling of 6389934539 in words is "six billion, three hundred eighty-nine million, nine hundred thirty-four thousand, five hundred thirty-nine".