320320313 has 2 divisors, whose sum is σ = 320320314. Its totient is φ = 320320312.

The previous prime is 320320291. The next prime is 320320327. The reversal of 320320313 is 313023023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187909264 + 132411049 = 13708^2 + 11507^2 .

It is a cyclic number.

It is not a de Polignac number, because 320320313 - 2²⁰ = 319271737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320320291 and 320320300.

It is not a weakly prime, because it can be changed into another prime (320320213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160160156 + 160160157.

It is an arithmetic number, because the mean of its divisors is an integer number (160160157).

Almost surely, 2^320320313 is an apocalyptic number.

It is an amenable number.

320320313 is a deficient number, since it is larger than the sum of its proper divisors (1).

320320313 is an equidigital number, since it uses as much as digits as its factorization.

320320313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 17.

The square root of 320320313 is about 17897.4946012005. The cubic root of 320320313 is about 684.2185223676.

Adding to 320320313 its reverse (313023023), we get a palindrome (633343336).

The spelling of 320320313 in words is "three hundred twenty million, three hundred twenty thousand, three hundred thirteen".