6430439 has 2 divisors, whose sum is σ = 6430440. Its totient is φ = 6430438.

The previous prime is 6430433. The next prime is 6430441. The reversal of 6430439 is 9340346.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6430439 - 2⁸ = 6430183 is a prime.

Together with 6430441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6430433) 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 as a sum of consecutive naturals, namely, 3215219 + 3215220.

It is an arithmetic number, because the mean of its divisors is an integer number (3215220).

Almost surely, 2^6430439 is an apocalyptic number.

6430439 is a deficient number, since it is larger than the sum of its proper divisors (1).

6430439 is an equidigital number, since it uses as much as digits as its factorization.

6430439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 6430439 is about 2535.8310274937. The cubic root of 6430439 is about 185.9574323523.

It can be divided in two parts, 64 and 30439, that added together give a palindrome (30503).

The spelling of 6430439 in words is "six million, four hundred thirty thousand, four hundred thirty-nine".