6389934139 has 2 divisors, whose sum is σ = 6389934140. Its totient is φ = 6389934138.

The previous prime is 6389934127. The next prime is 6389934163. The reversal of 6389934139 is 9314399836.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6389934139 - 2¹¹ = 6389932091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6389934139.

It is not a weakly prime, because it can be changed into another prime (6389934539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3194967069 + 3194967070.

It is an arithmetic number, because the mean of its divisors is an integer number (3194967070).

Almost surely, 2^6389934139 is an apocalyptic number.

6389934139 is a deficient number, since it is larger than the sum of its proper divisors (1).

6389934139 is an equidigital number, since it uses as much as digits as its factorization.

6389934139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 55.

The square root of 6389934139 is about 79937.0636125696. The cubic root of 6389934139 is about 1855.6616562811.

The spelling of 6389934139 in words is "six billion, three hundred eighty-nine million, nine hundred thirty-four thousand, one hundred thirty-nine".