320317817 has 2 divisors, whose sum is σ = 320317818. Its totient is φ = 320317816.

The previous prime is 320317813. The next prime is 320317819. The reversal of 320317817 is 718713023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250778896 + 69538921 = 15836^2 + 8339^2 .

It is a cyclic number.

It is not a de Polignac number, because 320317817 - 2² = 320317813 is a prime.

Together with 320317819, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_17291408 and since 320317817 and 17291408 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (320317813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160158908 + 160158909.

It is an arithmetic number, because the mean of its divisors is an integer number (160158909).

Almost surely, 2^320317817 is an apocalyptic number.

It is an amenable number.

320317817 is a deficient number, since it is larger than the sum of its proper divisors (1).

320317817 is an equidigital number, since it uses as much as digits as its factorization.

320317817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 320317817 is about 17897.4248706343. The cubic root of 320317817 is about 684.2167451737.

The spelling of 320317817 in words is "three hundred twenty million, three hundred seventeen thousand, eight hundred seventeen".