198289 has 8 divisors (see below), whose sum is σ = 244160. Its totient is φ = 156816.

The previous prime is 198281. The next prime is 198301. The reversal of 198289 is 982891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198289 - 2³ = 198281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 999 + ... + 1180.

It is an arithmetic number, because the mean of its divisors is an integer number (30520).

2¹⁹⁸²⁸⁹ is an apocalyptic number.

It is an amenable number.

198289 is a deficient number, since it is larger than the sum of its proper divisors (45871).

198289 is a wasteful number, since it uses less digits than its factorization.

198289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199.

The product of its digits is 10368, while the sum is 37.

The square root of 198289 is about 445.2965304154. The cubic root of 198289 is about 58.3131104503.

The spelling of 198289 in words is "one hundred ninety-eight thousand, two hundred eighty-nine".