198403684038017 has 2 divisors, whose sum is σ = 198403684038018. Its totient is φ = 198403684038016.

The previous prime is 198403684037941. The next prime is 198403684038097. The reversal of 198403684038017 is 710830486304891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148591199660401 + 49812484377616 = 12189799^2 + 7057796^2 .

It is a cyclic number.

It is not a de Polignac number, because 198403684038017 - 2¹² = 198403684033921 is a prime.

It is not a weakly prime, because it can be changed into another prime (198403684038097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99201842019008 + 99201842019009.

It is an arithmetic number, because the mean of its divisors is an integer number (99201842019009).

Almost surely, 2^{198403684038017} is an apocalyptic number.

It is an amenable number.

198403684038017 is a deficient number, since it is larger than the sum of its proper divisors (1).

198403684038017 is an equidigital number, since it uses as much as digits as its factorization.

198403684038017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27869184, while the sum is 62.

The spelling of 198403684038017 in words is "one hundred ninety-eight trillion, four hundred three billion, six hundred eighty-four million, thirty-eight thousand, seventeen".