6397817 has 2 divisors, whose sum is σ = 6397818. Its totient is φ = 6397816.

The previous prime is 6397771. The next prime is 6397823. The reversal of 6397817 is 7187936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3904576 + 2493241 = 1976^2 + 1579^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6397817 is a prime.

It is a super-3 number, since 3×6397817³ (a number of 21 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6397837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3198908 + 3198909.

It is an arithmetic number, because the mean of its divisors is an integer number (3198909).

Almost surely, 2^6397817 is an apocalyptic number.

It is an amenable number.

6397817 is a deficient number, since it is larger than the sum of its proper divisors (1).

6397817 is an equidigital number, since it uses as much as digits as its factorization.

6397817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The square root of 6397817 is about 2529.3906380787. The cubic root of 6397817 is about 185.6424413847.

The spelling of 6397817 in words is "six million, three hundred ninety-seven thousand, eight hundred seventeen".