6397609 has 2 divisors, whose sum is σ = 6397610. Its totient is φ = 6397608.

The previous prime is 6397607. The next prime is 6397631. The reversal of 6397609 is 9067936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3229209 + 3168400 = 1797^2 + 1780^2 .

It is a cyclic number.

It is not a de Polignac number, because 6397609 - 2¹ = 6397607 is a prime.

Together with 6397607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6397607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3198804 + 3198805.

It is an arithmetic number, because the mean of its divisors is an integer number (3198805).

Almost surely, 2^6397609 is an apocalyptic number.

It is an amenable number.

6397609 is a deficient number, since it is larger than the sum of its proper divisors (1).

6397609 is an equidigital number, since it uses as much as digits as its factorization.

6397609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 6397609 is about 2529.3495211220. The cubic root of 6397609 is about 185.6404295503.

The spelling of 6397609 in words is "six million, three hundred ninety-seven thousand, six hundred nine".