198554 has 4 divisors (see below), whose sum is σ = 297834. Its totient is φ = 99276.

The previous prime is 198553. The next prime is 198571. The reversal of 198554 is 455891.

198554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 455891 = 71 ⋅6421.

It can be written as a sum of positive squares in only one way, i.e., 198025 + 529 = 445^2 + 23^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 198554.

It is not an unprimeable number, because it can be changed into a prime (198553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49637 + ... + 49640.

2¹⁹⁸⁵⁵⁴ is an apocalyptic number.

198554 is a deficient number, since it is larger than the sum of its proper divisors (99280).

198554 is an equidigital number, since it uses as much as digits as its factorization.

198554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99279.

The product of its digits is 7200, while the sum is 32.

The square root of 198554 is about 445.5939855968. The cubic root of 198554 is about 58.3390760786.

The spelling of 198554 in words is "one hundred ninety-eight thousand, five hundred fifty-four".