198559 has 8 divisors (see below), whose sum is σ = 211680. Its totient is φ = 185856.

The previous prime is 198553. The next prime is 198571. The reversal of 198559 is 955891.

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 198559 - 2⁹ = 198047 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1999 + ... + 2095.

It is an arithmetic number, because the mean of its divisors is an integer number (26460).

2¹⁹⁸⁵⁵⁹ is an apocalyptic number.

198559 is a deficient number, since it is larger than the sum of its proper divisors (13121).

198559 is an equidigital number, since it uses as much as digits as its factorization.

198559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209.

The product of its digits is 16200, while the sum is 37.

The square root of 198559 is about 445.5995960501. The cubic root of 198559 is about 58.3395657740.

It can be divided in two parts, 198 and 559, that added together give a palindrome (757).

The spelling of 198559 in words is "one hundred ninety-eight thousand, five hundred fifty-nine".