320664017 has 2 divisors, whose sum is σ = 320664018. Its totient is φ = 320664016.

The previous prime is 320663983. The next prime is 320664037. The reversal of 320664017 is 710466023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282273601 + 38390416 = 16801^2 + 6196^2 .

It is a cyclic number.

It is not a de Polignac number, because 320664017 - 2¹² = 320659921 is a prime.

It is not a weakly prime, because it can be changed into another prime (320664037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160332008 + 160332009.

It is an arithmetic number, because the mean of its divisors is an integer number (160332009).

Almost surely, 2^320664017 is an apocalyptic number.

It is an amenable number.

320664017 is a deficient number, since it is larger than the sum of its proper divisors (1).

320664017 is an equidigital number, since it uses as much as digits as its factorization.

320664017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 320664017 is about 17907.0940411894. The cubic root of 320664017 is about 684.4631572653.

The spelling of 320664017 in words is "three hundred twenty million, six hundred sixty-four thousand, seventeen".