320444473 has 2 divisors, whose sum is σ = 320444474. Its totient is φ = 320444472.

The previous prime is 320444459. The next prime is 320444521. The reversal of 320444473 is 374444023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 300086329 + 20358144 = 17323^2 + 4512^2 .

It is a cyclic number.

It is not a de Polignac number, because 320444473 - 2⁹ = 320443961 is a prime.

It is not a weakly prime, because it can be changed into another prime (320448473) 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, 160222236 + 160222237.

It is an arithmetic number, because the mean of its divisors is an integer number (160222237).

Almost surely, 2^320444473 is an apocalyptic number.

It is an amenable number.

320444473 is a deficient number, since it is larger than the sum of its proper divisors (1).

320444473 is an equidigital number, since it uses as much as digits as its factorization.

320444473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 31.

The square root of 320444473 is about 17900.9629070617. The cubic root of 320444473 is about 684.3069147199.

Adding to 320444473 its reverse (374444023), we get a palindrome (694888496).

The spelling of 320444473 in words is "three hundred twenty million, four hundred forty-four thousand, four hundred seventy-three".