320020313 has 2 divisors, whose sum is σ = 320020314. Its totient is φ = 320020312.

The previous prime is 320020303. The next prime is 320020331. The reversal of 320020313 is 313020023.

Together with next prime (320020331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160452889 + 159567424 = 12667^2 + 12632^2 .

It is an emirp because it is prime and its reverse (313020023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320020313 - 2⁴ = 320020297 is a prime.

It is not a weakly prime, because it can be changed into another prime (320020303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160010156 + 160010157.

It is an arithmetic number, because the mean of its divisors is an integer number (160010157).

Almost surely, 2^320020313 is an apocalyptic number.

It is an amenable number.

320020313 is a deficient number, since it is larger than the sum of its proper divisors (1).

320020313 is an equidigital number, since it uses as much as digits as its factorization.

320020313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 320020313 is about 17889.1115765988. Note that the first 3 decimals coincide. The cubic root of 320020313 is about 684.0048511734.

Adding to 320020313 its reverse (313020023), we get a palindrome (633040336).

The spelling of 320020313 in words is "three hundred twenty million, twenty thousand, three hundred thirteen".