6397252457 has 2 divisors, whose sum is σ = 6397252458. Its totient is φ = 6397252456.

The previous prime is 6397252409. The next prime is 6397252469. The reversal of 6397252457 is 7542527936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3818745616 + 2578506841 = 61796^2 + 50779^2 .

It is a cyclic number.

It is not a de Polignac number, because 6397252457 - 2²⁶ = 6330143593 is a prime.

It is not a weakly prime, because it can be changed into another prime (6397252487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3198626228 + 3198626229.

It is an arithmetic number, because the mean of its divisors is an integer number (3198626229).

Almost surely, 2^6397252457 is an apocalyptic number.

It is an amenable number.

6397252457 is a deficient number, since it is larger than the sum of its proper divisors (1).

6397252457 is an equidigital number, since it uses as much as digits as its factorization.

6397252457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3175200, while the sum is 50.

The square root of 6397252457 is about 79982.8260128385. The cubic root of 6397252457 is about 1856.3698086470.

The spelling of 6397252457 in words is "six billion, three hundred ninety-seven million, two hundred fifty-two thousand, four hundred fifty-seven".