394961328317 has 2 divisors, whose sum is σ = 394961328318. Its totient is φ = 394961328316.

The previous prime is 394961328277. The next prime is 394961328319. The reversal of 394961328317 is 713823169493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 387467655961 + 7493672356 = 622469^2 + 86566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394961328317 is a prime.

Together with 394961328319, 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 (394961328319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197480664158 + 197480664159.

It is an arithmetic number, because the mean of its divisors is an integer number (197480664159).

Almost surely, 2^394961328317 is an apocalyptic number.

It is an amenable number.

394961328317 is a deficient number, since it is larger than the sum of its proper divisors (1).

394961328317 is an equidigital number, since it uses as much as digits as its factorization.

394961328317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 56.

The spelling of 394961328317 in words is "three hundred ninety-four billion, nine hundred sixty-one million, three hundred twenty-eight thousand, three hundred seventeen".