198355 has 4 divisors (see below), whose sum is σ = 238032. Its totient is φ = 158680.

The previous prime is 198349. The next prime is 198377. The reversal of 198355 is 553891.

198355 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 is not a de Polignac number, because 198355 - 2³ = 198347 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19831 + ... + 19840.

It is an arithmetic number, because the mean of its divisors is an integer number (59508).

2¹⁹⁸³⁵⁵ is an apocalyptic number.

198355 is a deficient number, since it is larger than the sum of its proper divisors (39677).

198355 is an equidigital number, since it uses as much as digits as its factorization.

198355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39676.

The product of its digits is 5400, while the sum is 31.

The square root of 198355 is about 445.3706321706. The cubic root of 198355 is about 58.3195795238.

The spelling of 198355 in words is "one hundred ninety-eight thousand, three hundred fifty-five".