420304439 has 2 divisors, whose sum is σ = 420304440. Its totient is φ = 420304438.

The previous prime is 420304429. The next prime is 420304441. The reversal of 420304439 is 934403024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420304439 is a prime.

Together with 420304441, 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 (420304429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210152219 + 210152220.

It is an arithmetic number, because the mean of its divisors is an integer number (210152220).

Almost surely, 2^420304439 is an apocalyptic number.

420304439 is a deficient number, since it is larger than the sum of its proper divisors (1).

420304439 is an equidigital number, since it uses as much as digits as its factorization.

420304439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 420304439 is about 20501.3277374906. The cubic root of 420304439 is about 749.0681398469.

The spelling of 420304439 in words is "four hundred twenty million, three hundred four thousand, four hundred thirty-nine".