198792986017 has 2 divisors, whose sum is σ = 198792986018. Its totient is φ = 198792986016.

The previous prime is 198792985987. The next prime is 198792986023. The reversal of 198792986017 is 710689297891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198555795216 + 237190801 = 445596^2 + 15401^2 .

It is a cyclic number.

It is not a de Polignac number, because 198792986017 - 2²⁷ = 198658768289 is a prime.

It is not a weakly prime, because it can be changed into another prime (198792987017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99396493008 + 99396493009.

It is an arithmetic number, because the mean of its divisors is an integer number (99396493009).

Almost surely, 2^198792986017 is an apocalyptic number.

It is an amenable number.

198792986017 is a deficient number, since it is larger than the sum of its proper divisors (1).

198792986017 is an equidigital number, since it uses as much as digits as its factorization.

198792986017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27433728, while the sum is 67.

The spelling of 198792986017 in words is "one hundred ninety-eight billion, seven hundred ninety-two million, nine hundred eighty-six thousand, seventeen".