320123317 has 2 divisors, whose sum is σ = 320123318. Its totient is φ = 320123316.

The previous prime is 320123231. The next prime is 320123359. The reversal of 320123317 is 713321023.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 305061156 + 15062161 = 17466^2 + 3881^2 .

It is a cyclic number.

It is not a de Polignac number, because 320123317 - 2⁷ = 320123189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320123017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160061658 + 160061659.

It is an arithmetic number, because the mean of its divisors is an integer number (160061659).

Almost surely, 2^320123317 is an apocalyptic number.

It is an amenable number.

320123317 is a deficient number, since it is larger than the sum of its proper divisors (1).

320123317 is an equidigital number, since it uses as much as digits as its factorization.

320123317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 320123317 is about 17891.9903029261. The cubic root of 320123317 is about 684.0782295133.

The spelling of 320123317 in words is "three hundred twenty million, one hundred twenty-three thousand, three hundred seventeen".