198863 has 4 divisors (see below), whose sum is σ = 227280. Its totient is φ = 170448.

The previous prime is 198859. The next prime is 198899. The reversal of 198863 is 368891.

198863 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: 368891 = 97 ⋅3803.

It is a cyclic number.

It is not a de Polignac number, because 198863 - 2² = 198859 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198823) 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, 14198 + ... + 14211.

It is an arithmetic number, because the mean of its divisors is an integer number (56820).

2¹⁹⁸⁸⁶³ is an apocalyptic number.

198863 is a deficient number, since it is larger than the sum of its proper divisors (28417).

198863 is an equidigital number, since it uses as much as digits as its factorization.

198863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28416.

The product of its digits is 10368, while the sum is 35.

The square root of 198863 is about 445.9405790013. The cubic root of 198863 is about 58.3693238218.

The spelling of 198863 in words is "one hundred ninety-eight thousand, eight hundred sixty-three".