6429439 has 2 divisors, whose sum is σ = 6429440. Its totient is φ = 6429438.

The previous prime is 6429433. The next prime is 6429457. The reversal of 6429439 is 9349246.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6429439 is a prime.

It is a Chen prime.

6429439 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6429398 and 6429407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6429433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3214719 + 3214720.

It is an arithmetic number, because the mean of its divisors is an integer number (3214720).

Almost surely, 2^6429439 is an apocalyptic number.

6429439 is a deficient number, since it is larger than the sum of its proper divisors (1).

6429439 is an equidigital number, since it uses as much as digits as its factorization.

6429439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 37.

The square root of 6429439 is about 2535.6338458066. The cubic root of 6429439 is about 185.9477924157.

The spelling of 6429439 in words is "six million, four hundred twenty-nine thousand, four hundred thirty-nine".