6397679 has 4 divisors (see below), whose sum is σ = 6411000. Its totient is φ = 6384360.

The previous prime is 6397667. The next prime is 6397691. The reversal of 6397679 is 9767936.

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

It is an interprime number because it is at equal distance from previous prime (6397667) and next prime (6397691).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6397679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6397609) 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, 5912 + ... + 6909.

It is an arithmetic number, because the mean of its divisors is an integer number (1602750).

Almost surely, 2^6397679 is an apocalyptic number.

6397679 is a deficient number, since it is larger than the sum of its proper divisors (13321).

6397679 is a wasteful number, since it uses less digits than its factorization.

6397679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13320.

The product of its digits is 428652, while the sum is 47.

The square root of 6397679 is about 2529.3633586339. The cubic root of 6397679 is about 185.6411066148.

The spelling of 6397679 in words is "six million, three hundred ninety-seven thousand, six hundred seventy-nine".