198806017 has 2 divisors, whose sum is σ = 198806018. Its totient is φ = 198806016.

The previous prime is 198806009. The next prime is 198806029. The reversal of 198806017 is 710608891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194769936 + 4036081 = 13956^2 + 2009^2 .

It is a cyclic number.

It is not a de Polignac number, because 198806017 - 2³ = 198806009 is a prime.

It is not a weakly prime, because it can be changed into another prime (198801017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99403008 + 99403009.

It is an arithmetic number, because the mean of its divisors is an integer number (99403009).

Almost surely, 2^198806017 is an apocalyptic number.

It is an amenable number.

198806017 is a deficient number, since it is larger than the sum of its proper divisors (1).

198806017 is an equidigital number, since it uses as much as digits as its factorization.

198806017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 198806017 is about 14099.8587581578. The cubic root of 198806017 is about 583.6374816262.

The spelling of 198806017 in words is "one hundred ninety-eight million, eight hundred six thousand, seventeen".