198243 has 6 divisors (see below), whose sum is σ = 286364. Its totient is φ = 132156.

The previous prime is 198241. The next prime is 198251. The reversal of 198243 is 342891.

It is not a de Polignac number, because 198243 - 2¹ = 198241 is a prime.

It is a Duffinian number.

198243 is a modest number, since divided by 243 gives 198 as remainder.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (198241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11005 + ... + 11022.

2¹⁹⁸²⁴³ is an apocalyptic number.

198243 is a deficient number, since it is larger than the sum of its proper divisors (88121).

198243 is a wasteful number, since it uses less digits than its factorization.

198243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22033 (or 22030 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 198243 is about 445.2448764444. The cubic root of 198243 is about 58.3086008531.

It can be divided in two parts, 1982 and 43, that added together give a square (2025 = 45²).

The spelling of 198243 in words is "one hundred ninety-eight thousand, two hundred forty-three".