320543473 has 2 divisors, whose sum is σ = 320543474. Its totient is φ = 320543472.

The previous prime is 320543413. The next prime is 320543491. The reversal of 320543473 is 374345023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284158449 + 36385024 = 16857^2 + 6032^2 .

It is a cyclic number.

It is not a de Polignac number, because 320543473 - 2²¹ = 318446321 is a prime.

It is not a weakly prime, because it can be changed into another prime (320543413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160271736 + 160271737.

It is an arithmetic number, because the mean of its divisors is an integer number (160271737).

Almost surely, 2^320543473 is an apocalyptic number.

It is an amenable number.

320543473 is a deficient number, since it is larger than the sum of its proper divisors (1).

320543473 is an equidigital number, since it uses as much as digits as its factorization.

320543473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 31.

The square root of 320543473 is about 17903.7279078967. The cubic root of 320543473 is about 684.3773787314.

Adding to 320543473 its reverse (374345023), we get a palindrome (694888496).

The spelling of 320543473 in words is "three hundred twenty million, five hundred forty-three thousand, four hundred seventy-three".