6396999 has 12 divisors (see below), whose sum is σ = 9922104. Its totient is φ = 3655344.

The previous prime is 6396997. The next prime is 6397003. The reversal of 6396999 is 9996936.

It is not a de Polignac number, because 6396999 - 2¹ = 6396997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6396997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21612 + ... + 21905.

It is an arithmetic number, because the mean of its divisors is an integer number (826842).

Almost surely, 2^6396999 is an apocalyptic number.

6396999 is a deficient number, since it is larger than the sum of its proper divisors (3525105).

6396999 is a wasteful number, since it uses less digits than its factorization.

6396999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43534 (or 43527 counting only the distinct ones).

The product of its digits is 708588, while the sum is 51.

The square root of 6396999 is about 2529.2289338848. The cubic root of 6396999 is about 185.6345292073.

The spelling of 6396999 in words is "six million, three hundred ninety-six thousand, nine hundred ninety-nine".