6396431 has 4 divisors (see below), whose sum is σ = 6459864. Its totient is φ = 6333000.

The previous prime is 6396409. The next prime is 6396433. The reversal of 6396431 is 1346936.

It is a happy number.

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 6396431 - 2¹⁰ = 6395407 is a prime.

It is a super-2 number, since 2×6396431² = 81828659075522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6396433) 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 3 ways as a sum of consecutive naturals, for example, 31565 + ... + 31766.

It is an arithmetic number, because the mean of its divisors is an integer number (1614966).

Almost surely, 2^6396431 is an apocalyptic number.

6396431 is a deficient number, since it is larger than the sum of its proper divisors (63433).

6396431 is a wasteful number, since it uses less digits than its factorization.

6396431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63432.

The product of its digits is 11664, while the sum is 32.

The square root of 6396431 is about 2529.1166442060. The cubic root of 6396431 is about 185.6290347802.

The spelling of 6396431 in words is "six million, three hundred ninety-six thousand, four hundred thirty-one".