398375317 has 2 divisors, whose sum is σ = 398375318. Its totient is φ = 398375316.

The previous prime is 398375287. The next prime is 398375321. The reversal of 398375317 is 713573893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229401316 + 168974001 = 15146^2 + 12999^2 .

It is an emirp because it is prime and its reverse (713573893) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398375317 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 (398375347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199187658 + 199187659.

It is an arithmetic number, because the mean of its divisors is an integer number (199187659).

Almost surely, 2^398375317 is an apocalyptic number.

It is an amenable number.

398375317 is a deficient number, since it is larger than the sum of its proper divisors (1).

398375317 is an equidigital number, since it uses as much as digits as its factorization.

398375317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 46.

The square root of 398375317 is about 19959.3415973574. The cubic root of 398375317 is about 735.8073821767.

It can be divided in two parts, 39837 and 5317, that added together give a palindrome (45154).

The spelling of 398375317 in words is "three hundred ninety-eight million, three hundred seventy-five thousand, three hundred seventeen".