6397657 has 16 divisors (see below), whose sum is σ = 7741440. Its totient is φ = 5168592.

The previous prime is 6397649. The next prime is 6397667. The reversal of 6397657 is 7567936.

It is a cyclic number.

It is not a de Polignac number, because 6397657 - 2³ = 6397649 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6397607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12468 + ... + 12970.

It is an arithmetic number, because the mean of its divisors is an integer number (483840).

Almost surely, 2^6397657 is an apocalyptic number.

It is an amenable number.

6397657 is a deficient number, since it is larger than the sum of its proper divisors (1343783).

6397657 is a wasteful number, since it uses less digits than its factorization.

6397657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612.

The product of its digits is 238140, while the sum is 43.

The square root of 6397657 is about 2529.3590097098. The cubic root of 6397657 is about 185.6408938236.

The spelling of 6397657 in words is "six million, three hundred ninety-seven thousand, six hundred fifty-seven".