198870219017 has 4 divisors (see below), whose sum is σ = 198894277380. Its totient is φ = 198846160656.

The previous prime is 198870219013. The next prime is 198870219047. The reversal of 198870219017 is 710912078891.

198870219017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 185075481616 + 13794737401 = 430204^2 + 117451^2 .

It is a cyclic number.

It is not a de Polignac number, because 198870219017 - 2² = 198870219013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198870219017.

It is not an unprimeable number, because it can be changed into a prime (198870219013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12016778 + ... + 12033315.

It is an arithmetic number, because the mean of its divisors is an integer number (49723569345).

Almost surely, 2^198870219017 is an apocalyptic number.

It is an amenable number.

198870219017 is a deficient number, since it is larger than the sum of its proper divisors (24058363).

198870219017 is an equidigital number, since it uses as much as digits as its factorization.

198870219017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24058362.

The product of its (nonzero) digits is 508032, while the sum is 53.

The spelling of 198870219017 in words is "one hundred ninety-eight billion, eight hundred seventy million, two hundred nineteen thousand, seventeen".