6397 has 2 divisors, whose sum is σ = 6398. Its totient is φ = 6396.

The previous prime is 6389. The next prime is 6421. The reversal of 6397 is 7936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3481 + 2916 = 59^2 + 54^2 .

6397 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 6397 - 2³ = 6389 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3198 + 3199.

It is an arithmetic number, because the mean of its divisors is an integer number (3199).

2⁶³⁹⁷ is an apocalyptic number.

It is an amenable number.

6397 is a deficient number, since it is larger than the sum of its proper divisors (1).

6397 is an equidigital number, since it uses as much as digits as its factorization.

6397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134, while the sum is 25.

The square root of 6397 is about 79.9812478022. The cubic root of 6397 is about 18.5634538880.

It can be divided in two parts, 639 and 7, that added together give a palindrome (646).

The spelling of 6397 in words is "six thousand, three hundred ninety-seven".