198000423017 has 2 divisors, whose sum is σ = 198000423018. Its totient is φ = 198000423016.

The previous prime is 198000422947. The next prime is 198000423031. The reversal of 198000423017 is 710324000891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189443433001 + 8556990016 = 435251^2 + 92504^2 .

It is a cyclic number.

It is not a de Polignac number, because 198000423017 - 2⁸ = 198000422761 is a prime.

It is not a weakly prime, because it can be changed into another prime (198000423077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99000211508 + 99000211509.

It is an arithmetic number, because the mean of its divisors is an integer number (99000211509).

Almost surely, 2^198000423017 is an apocalyptic number.

It is an amenable number.

198000423017 is a deficient number, since it is larger than the sum of its proper divisors (1).

198000423017 is an equidigital number, since it uses as much as digits as its factorization.

198000423017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The spelling of 198000423017 in words is "one hundred ninety-eight billion, four hundred twenty-three thousand, seventeen".