320063309 has 2 divisors, whose sum is σ = 320063310. Its totient is φ = 320063308.

The previous prime is 320063299. The next prime is 320063311. The reversal of 320063309 is 903360023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266407684 + 53655625 = 16322^2 + 7325^2 .

It is a cyclic number.

It is not a de Polignac number, because 320063309 - 2²⁸ = 51627853 is a prime.

Together with 320063311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320063329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160031654 + 160031655.

It is an arithmetic number, because the mean of its divisors is an integer number (160031655).

Almost surely, 2^320063309 is an apocalyptic number.

It is an amenable number.

320063309 is a deficient number, since it is larger than the sum of its proper divisors (1).

320063309 is an equidigital number, since it uses as much as digits as its factorization.

320063309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 26.

The square root of 320063309 is about 17890.3132728301. The cubic root of 320063309 is about 684.0354827243.

The spelling of 320063309 in words is "three hundred twenty million, sixty-three thousand, three hundred nine".