6396691 has 16 divisors (see below), whose sum is σ = 7755264. Its totient is φ = 5157504.

The previous prime is 6396683. The next prime is 6396701. The reversal of 6396691 is 1966936.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6396691 - 2³ = 6396683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6396631) 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 15 ways as a sum of consecutive naturals, for example, 10491 + ... + 11083.

It is an arithmetic number, because the mean of its divisors is an integer number (484704).

Almost surely, 2^6396691 is an apocalyptic number.

6396691 is a deficient number, since it is larger than the sum of its proper divisors (1358573).

6396691 is a wasteful number, since it uses less digits than its factorization.

6396691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690.

The product of its digits is 52488, while the sum is 40.

The square root of 6396691 is about 2529.1680450298. The cubic root of 6396691 is about 185.6315498753.

The spelling of 6396691 in words is "six million, three hundred ninety-six thousand, six hundred ninety-one".