320445439 has 2 divisors, whose sum is σ = 320445440. Its totient is φ = 320445438.

The previous prime is 320445421. The next prime is 320445467. The reversal of 320445439 is 934544023.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320445439 - 2¹⁵ = 320412671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320445239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160222719 + 160222720.

It is an arithmetic number, because the mean of its divisors is an integer number (160222720).

Almost surely, 2^320445439 is an apocalyptic number.

320445439 is a deficient number, since it is larger than the sum of its proper divisors (1).

320445439 is an equidigital number, since it uses as much as digits as its factorization.

320445439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 320445439 is about 17900.9898888302. The cubic root of 320445439 is about 684.3076023479.

The spelling of 320445439 in words is "three hundred twenty million, four hundred forty-five thousand, four hundred thirty-nine".