6397252409 has 2 divisors, whose sum is σ = 6397252410. Its totient is φ = 6397252408.

The previous prime is 6397252399. The next prime is 6397252457. The reversal of 6397252409 is 9042527936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5890102009 + 507150400 = 76747^2 + 22520^2 .

It is a cyclic number.

It is not a de Polignac number, because 6397252409 - 2³² = 2102285113 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6397252469) 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, 3198626204 + 3198626205.

It is an arithmetic number, because the mean of its divisors is an integer number (3198626205).

Almost surely, 2^6397252409 is an apocalyptic number.

It is an amenable number.

6397252409 is a deficient number, since it is larger than the sum of its proper divisors (1).

6397252409 is an equidigital number, since it uses as much as digits as its factorization.

6397252409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 47.

The square root of 6397252409 is about 79982.8257127741. The cubic root of 6397252409 is about 1856.3698040041.

The spelling of 6397252409 in words is "six billion, three hundred ninety-seven million, two hundred fifty-two thousand, four hundred nine".