198249 has 4 divisors (see below), whose sum is σ = 264336. Its totient is φ = 132164.

The previous prime is 198241. The next prime is 198251. The reversal of 198249 is 942891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 198249 - 2³ = 198241 is a prime.

It is a D-number.

198249 is a lucky number.

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 3 ways as a sum of consecutive naturals, for example, 33039 + ... + 33044.

It is an arithmetic number, because the mean of its divisors is an integer number (66084).

2¹⁹⁸²⁴⁹ is an apocalyptic number.

It is an amenable number.

198249 is a deficient number, since it is larger than the sum of its proper divisors (66087).

198249 is an equidigital number, since it uses as much as digits as its factorization.

198249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66086.

The product of its digits is 5184, while the sum is 33.

The square root of 198249 is about 445.2516142587. The cubic root of 198249 is about 58.3091891010.

The spelling of 198249 in words is "one hundred ninety-eight thousand, two hundred forty-nine".