6439331 has 2 divisors, whose sum is σ = 6439332. Its totient is φ = 6439330.

The previous prime is 6439327. The next prime is 6439357. The reversal of 6439331 is 1339346.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6439331 - 2² = 6439327 is a prime.

It is a super-2 number, since 2×6439331² = 82929967455122, which contains 22 as substring.

It is equal to p₄₄₀₈₉₄ and since 6439331 and 440894 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 6439294 and 6439303.

It is not a weakly prime, because it can be changed into another prime (6432331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3219665 + 3219666.

It is an arithmetic number, because the mean of its divisors is an integer number (3219666).

Almost surely, 2^6439331 is an apocalyptic number.

6439331 is a deficient number, since it is larger than the sum of its proper divisors (1).

6439331 is an equidigital number, since it uses as much as digits as its factorization.

6439331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 29.

The square root of 6439331 is about 2537.5836932011. The cubic root of 6439331 is about 186.0431067469.

The spelling of 6439331 in words is "six million, four hundred thirty-nine thousand, three hundred thirty-one".