198395 has 4 divisors (see below), whose sum is σ = 238080. Its totient is φ = 158712.

The previous prime is 198391. The next prime is 198397. The reversal of 198395 is 593891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 593891 = 29 ⋅20479.

It is a cyclic number.

It is not a de Polignac number, because 198395 - 2² = 198391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19835 + ... + 19844.

It is an arithmetic number, because the mean of its divisors is an integer number (59520).

2¹⁹⁸³⁹⁵ is an apocalyptic number.

198395 is a deficient number, since it is larger than the sum of its proper divisors (39685).

198395 is an equidigital number, since it uses as much as digits as its factorization.

198395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39684.

The product of its digits is 9720, while the sum is 35.

The square root of 198395 is about 445.4155363254. The cubic root of 198395 is about 58.3234994761.

It can be divided in two parts, 198 and 395, that multiplied together give a triangular number (78210 = T₃₉₅).

The spelling of 198395 in words is "one hundred ninety-eight thousand, three hundred ninety-five".