6397549 has 2 divisors, whose sum is σ = 6397550. Its totient is φ = 6397548.

The previous prime is 6397529. The next prime is 6397553. The reversal of 6397549 is 9457936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3222025 + 3175524 = 1795^2 + 1782^2 .

It is a cyclic number.

It is not a de Polignac number, because 6397549 - 2⁷ = 6397421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6397529) 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 as a sum of consecutive naturals, namely, 3198774 + 3198775.

It is an arithmetic number, because the mean of its divisors is an integer number (3198775).

Almost surely, 2^6397549 is an apocalyptic number.

It is an amenable number.

6397549 is a deficient number, since it is larger than the sum of its proper divisors (1).

6397549 is an equidigital number, since it uses as much as digits as its factorization.

6397549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 43.

The square root of 6397549 is about 2529.3376603372. The cubic root of 6397549 is about 185.6398492053.

The spelling of 6397549 in words is "six million, three hundred ninety-seven thousand, five hundred forty-nine".