6397831 has 8 divisors (see below), whose sum is σ = 7390224. Its totient is φ = 5473920.

The previous prime is 6397823. The next prime is 6397837. The reversal of 6397831 is 1387936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6397831 - 2³ = 6397823 is a prime.

It is a super-2 number, since 2×6397831² = 81864483009122, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6397837) 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 7 ways as a sum of consecutive naturals, for example, 16920 + ... + 17293.

It is an arithmetic number, because the mean of its divisors is an integer number (923778).

Almost surely, 2^6397831 is an apocalyptic number.

6397831 is a deficient number, since it is larger than the sum of its proper divisors (992393).

6397831 is a wasteful number, since it uses less digits than its factorization.

6397831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34241.

The product of its digits is 27216, while the sum is 37.

The square root of 6397831 is about 2529.3934055421. The cubic root of 6397831 is about 185.6425767951.

It can be divided in two parts, 63978 and 31, that added together give a square (64009 = 253²).

The spelling of 6397831 in words is "six million, three hundred ninety-seven thousand, eight hundred thirty-one".