198895 has 4 divisors (see below), whose sum is σ = 238680. Its totient is φ = 159112.

The previous prime is 198859. The next prime is 198899. The reversal of 198895 is 598891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198895 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198899) 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, 19885 + ... + 19894.

It is an arithmetic number, because the mean of its divisors is an integer number (59670).

2¹⁹⁸⁸⁹⁵ is an apocalyptic number.

198895 is a deficient number, since it is larger than the sum of its proper divisors (39785).

198895 is an equidigital number, since it uses as much as digits as its factorization.

198895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39784.

The product of its digits is 25920, while the sum is 40.

The square root of 198895 is about 445.9764567777. The cubic root of 198895 is about 58.3724544832.

The spelling of 198895 in words is "one hundred ninety-eight thousand, eight hundred ninety-five".