198163 has 4 divisors (see below), whose sum is σ = 226480. Its totient is φ = 169848.

The previous prime is 198139. The next prime is 198173. The reversal of 198163 is 361891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 361891 = 29 ⋅12479.

It is not a de Polignac number, because 198163 - 2⁹ = 197651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198173) 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 3 ways as a sum of consecutive naturals, for example, 14148 + ... + 14161.

It is an arithmetic number, because the mean of its divisors is an integer number (56620).

2¹⁹⁸¹⁶³ is an apocalyptic number.

198163 is a deficient number, since it is larger than the sum of its proper divisors (28317).

198163 is an equidigital number, since it uses as much as digits as its factorization.

198163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28316.

The product of its digits is 1296, while the sum is 28.

The square root of 198163 is about 445.1550291752. The cubic root of 198163 is about 58.3007564136.

Subtracting from 198163 its sum of digits (28), we obtain a triangular number (198135 = T₆₂₉).

It can be divided in two parts, 198 and 163, that added together give a square (361 = 19²).

The spelling of 198163 in words is "one hundred ninety-eight thousand, one hundred sixty-three".