6390000139 has 4 divisors (see below), whose sum is σ = 6667826256. Its totient is φ = 6112174024.

The previous prime is 6390000131. The next prime is 6390000163. The reversal of 6390000139 is 9310000936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6390000139 - 2³ = 6390000131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6390000139.

It is not an unprimeable number, because it can be changed into a prime (6390000131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138913024 + ... + 138913069.

It is an arithmetic number, because the mean of its divisors is an integer number (1666956564).

Almost surely, 2^6390000139 is an apocalyptic number.

6390000139 is a deficient number, since it is larger than the sum of its proper divisors (277826117).

6390000139 is a wasteful number, since it uses less digits than its factorization.

6390000139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277826116.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 6390000139 is about 79937.4764362749. The cubic root of 6390000139 is about 1855.6680451445.

The spelling of 6390000139 in words is "six billion, three hundred ninety million, one hundred thirty-nine", and thus it is an aban number.