320204317 has 2 divisors, whose sum is σ = 320204318. Its totient is φ = 320204316.

The previous prime is 320204309. The next prime is 320204351. The reversal of 320204317 is 713402023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247716121 + 72488196 = 15739^2 + 8514^2 .

It is an emirp because it is prime and its reverse (713402023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320204317 - 2³ = 320204309 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320201317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160102158 + 160102159.

It is an arithmetic number, because the mean of its divisors is an integer number (160102159).

Almost surely, 2^320204317 is an apocalyptic number.

It is an amenable number.

320204317 is a deficient number, since it is larger than the sum of its proper divisors (1).

320204317 is an equidigital number, since it uses as much as digits as its factorization.

320204317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 320204317 is about 17894.2537424727. The cubic root of 320204317 is about 684.1359215139.

The spelling of 320204317 in words is "three hundred twenty million, two hundred four thousand, three hundred seventeen".