320243369 has 2 divisors, whose sum is σ = 320243370. Its totient is φ = 320243368.

The previous prime is 320243311. The next prime is 320243381. The reversal of 320243369 is 963342023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 281803369 + 38440000 = 16787^2 + 6200^2 .

It is a cyclic number.

It is not a de Polignac number, because 320243369 - 2¹² = 320239273 is a prime.

It is a super-2 number, since 2×320243369² = 205111630776940322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (320243389) 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, 160121684 + 160121685.

It is an arithmetic number, because the mean of its divisors is an integer number (160121685).

Almost surely, 2^320243369 is an apocalyptic number.

It is an amenable number.

320243369 is a deficient number, since it is larger than the sum of its proper divisors (1).

320243369 is an equidigital number, since it uses as much as digits as its factorization.

320243369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 32.

The square root of 320243369 is about 17895.3448974866. The cubic root of 320243369 is about 684.1637327046.

The spelling of 320243369 in words is "three hundred twenty million, two hundred forty-three thousand, three hundred sixty-nine".