398842904017 has 2 divisors, whose sum is σ = 398842904018. Its totient is φ = 398842904016.

The previous prime is 398842904011. The next prime is 398842904027. The reversal of 398842904017 is 710409248893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 315062180416 + 83780723601 = 561304^2 + 289449^2 .

It is a cyclic number.

It is not a de Polignac number, because 398842904017 - 2³¹ = 396695420369 is a prime.

It is not a weakly prime, because it can be changed into another prime (398842904011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199421452008 + 199421452009.

It is an arithmetic number, because the mean of its divisors is an integer number (199421452009).

Almost surely, 2^398842904017 is an apocalyptic number.

It is an amenable number.

398842904017 is a deficient number, since it is larger than the sum of its proper divisors (1).

398842904017 is an equidigital number, since it uses as much as digits as its factorization.

398842904017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 398842904017 in words is "three hundred ninety-eight billion, eight hundred forty-two million, nine hundred four thousand, seventeen".