6390139 has 6 divisors (see below), whose sum is σ = 7433484. Its totient is φ = 5477220.

The previous prime is 6390127. The next prime is 6390161. The reversal of 6390139 is 9310936.

It is not a de Polignac number, because 6390139 - 2⁵ = 6390107 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 6390139.

It is not an unprimeable number, because it can be changed into a prime (6390119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65157 + ... + 65254.

It is an arithmetic number, because the mean of its divisors is an integer number (1238914).

Almost surely, 2^6390139 is an apocalyptic number.

6390139 is a deficient number, since it is larger than the sum of its proper divisors (1043345).

6390139 is a wasteful number, since it uses less digits than its factorization.

6390139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130425 (or 130418 counting only the distinct ones).

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

The square root of 6390139 is about 2527.8724255785. The cubic root of 6390139 is about 185.5681486879.

The spelling of 6390139 in words is "six million, three hundred ninety thousand, one hundred thirty-nine".