6397659 has 6 divisors (see below), whose sum is σ = 9241076. Its totient is φ = 4265100.

The previous prime is 6397649. The next prime is 6397667. The reversal of 6397659 is 9567936.

6397659 is a `hidden beast` number, since 639 + 7 + 6 + 5 + 9 = 666.

It is not a de Polignac number, because 6397659 - 2⁹ = 6397147 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 355417 + ... + 355434.

Almost surely, 2^6397659 is an apocalyptic number.

6397659 is a deficient number, since it is larger than the sum of its proper divisors (2843417).

6397659 is a wasteful number, since it uses less digits than its factorization.

6397659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710857 (or 710854 counting only the distinct ones).

The product of its digits is 306180, while the sum is 45.

The square root of 6397659 is about 2529.3594050668. The cubic root of 6397659 is about 185.6409131683.

It can be divided in two parts, 6397 and 659, that added together give a square (7056 = 84²).

The spelling of 6397659 in words is "six million, three hundred ninety-seven thousand, six hundred fifty-nine".