198459 has 6 divisors (see below), whose sum is σ = 286676. Its totient is φ = 132300.

The previous prime is 198439. The next prime is 198461. The reversal of 198459 is 954891.

It is not a de Polignac number, because 198459 - 2⁵ = 198427 is a prime.

It is a Duffinian number.

198459 is a lucky number.

It is a nialpdrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 198459.

It is not an unprimeable number, because it can be changed into a prime (198409) 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, 11017 + ... + 11034.

2¹⁹⁸⁴⁵⁹ is an apocalyptic number.

198459 is a deficient number, since it is larger than the sum of its proper divisors (88217).

198459 is a wasteful number, since it uses less digits than its factorization.

198459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22057 (or 22054 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 198459 is about 445.4873735584. The cubic root of 198459 is about 58.3297703039.

The spelling of 198459 in words is "one hundred ninety-eight thousand, four hundred fifty-nine".