198219673 has 4 divisors (see below), whose sum is σ = 204613888. Its totient is φ = 191825460.

The previous prime is 198219641. The next prime is 198219719. The reversal of 198219673 is 376912891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 376912891 = 23 ⋅16387517.

It is a cyclic number.

It is not a de Polignac number, because 198219673 - 2⁵ = 198219641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198219613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3197061 + ... + 3197122.

It is an arithmetic number, because the mean of its divisors is an integer number (51153472).

Almost surely, 2^198219673 is an apocalyptic number.

It is an amenable number.

198219673 is a deficient number, since it is larger than the sum of its proper divisors (6394215).

198219673 is an equidigital number, since it uses as much as digits as its factorization.

198219673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6394214.

The product of its digits is 163296, while the sum is 46.

The square root of 198219673 is about 14079.0508557928. The cubic root of 198219673 is about 583.0631373063.

The spelling of 198219673 in words is "one hundred ninety-eight million, two hundred nineteen thousand, six hundred seventy-three".