198223 has 2 divisors, whose sum is σ = 198224. Its totient is φ = 198222.

The previous prime is 198221. The next prime is 198241. The reversal of 198223 is 322891.

198223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (322891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198223 - 2¹ = 198221 is a prime.

Together with 198221, it forms a pair of twin primes.

198223 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99111 + 99112.

It is an arithmetic number, because the mean of its divisors is an integer number (99112).

2¹⁹⁸²²³ is an apocalyptic number.

198223 is a deficient number, since it is larger than the sum of its proper divisors (1).

198223 is an equidigital number, since it uses as much as digits as its factorization.

198223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 198223 is about 445.2224163269. Note that the first 3 decimals coincide. The cubic root of 198223 is about 58.3066399411.

The spelling of 198223 in words is "one hundred ninety-eight thousand, two hundred twenty-three".