6396731 has 4 divisors (see below), whose sum is σ = 6978264. Its totient is φ = 5815200.

The previous prime is 6396707. The next prime is 6396751. The reversal of 6396731 is 1376936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6396731 - 2¹⁰ = 6395707 is a prime.

It is a super-2 number, since 2×6396731² = 81836334972722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6396691 and 6396700.

It is not an unprimeable number, because it can be changed into a prime (6396701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290750 + ... + 290771.

It is an arithmetic number, because the mean of its divisors is an integer number (1744566).

Almost surely, 2^6396731 is an apocalyptic number.

6396731 is a deficient number, since it is larger than the sum of its proper divisors (581533).

6396731 is a wasteful number, since it uses less digits than its factorization.

6396731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581532.

The product of its digits is 20412, while the sum is 35.

The square root of 6396731 is about 2529.1759527562. The cubic root of 6396731 is about 185.6319368069.

The spelling of 6396731 in words is "six million, three hundred ninety-six thousand, seven hundred thirty-one".