398379017 has 2 divisors, whose sum is σ = 398379018. Its totient is φ = 398379016.

The previous prime is 398379013. The next prime is 398379043. The reversal of 398379017 is 710973893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 391881616 + 6497401 = 19796^2 + 2549^2 .

It is a cyclic number.

It is not a de Polignac number, because 398379017 - 2² = 398379013 is a prime.

It is not a weakly prime, because it can be changed into another prime (398379013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199189508 + 199189509.

It is an arithmetic number, because the mean of its divisors is an integer number (199189509).

Almost surely, 2^398379017 is an apocalyptic number.

It is an amenable number.

398379017 is a deficient number, since it is larger than the sum of its proper divisors (1).

398379017 is an equidigital number, since it uses as much as digits as its factorization.

398379017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 398379017 is about 19959.4342855703. The cubic root of 398379017 is about 735.8096601616.

The spelling of 398379017 in words is "three hundred ninety-eight million, three hundred seventy-nine thousand, seventeen".