198023 has 4 divisors (see below), whose sum is σ = 226320. Its totient is φ = 169728.

The previous prime is 198017. The next prime is 198031. The reversal of 198023 is 320891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320891 = 19 ⋅16889.

It is a cyclic number.

It is not a de Polignac number, because 198023 - 2⁶ = 197959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14138 + ... + 14151.

It is an arithmetic number, because the mean of its divisors is an integer number (56580).

2¹⁹⁸⁰²³ is an apocalyptic number.

198023 is a deficient number, since it is larger than the sum of its proper divisors (28297).

198023 is an equidigital number, since it uses as much as digits as its factorization.

198023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28296.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 198023 is about 444.9977528033. The cubic root of 198023 is about 58.2870235627.

The spelling of 198023 in words is "one hundred ninety-eight thousand, twenty-three".