198489 has 8 divisors (see below), whose sum is σ = 267520. Its totient is φ = 130896.

The previous prime is 198479. The next prime is 198491. The reversal of 198489 is 984891.

198489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 198489 - 2¹³ = 190297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24 + ... + 630.

It is an arithmetic number, because the mean of its divisors is an integer number (33440).

2¹⁹⁸⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

198489 is a deficient number, since it is larger than the sum of its proper divisors (69031).

198489 is a wasteful number, since it uses less digits than its factorization.

198489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719.

The product of its digits is 20736, while the sum is 39.

The square root of 198489 is about 445.5210432741. The cubic root of 198489 is about 58.3327092904.

The spelling of 198489 in words is "one hundred ninety-eight thousand, four hundred eighty-nine".