6390659 has 4 divisors (see below), whose sum is σ = 6971640. Its totient is φ = 5809680.

The previous prime is 6390653. The next prime is 6390679. The reversal of 6390659 is 9560936.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6390659 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (6390653) 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, 290474 + ... + 290495.

It is an arithmetic number, because the mean of its divisors is an integer number (1742910).

Almost surely, 2^6390659 is an apocalyptic number.

6390659 is a deficient number, since it is larger than the sum of its proper divisors (580981).

6390659 is a wasteful number, since it uses less digits than its factorization.

6390659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580980.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 6390659 is about 2527.9752767778. The cubic root of 6390659 is about 185.5731821110.

The spelling of 6390659 in words is "six million, three hundred ninety thousand, six hundred fifty-nine".