198995 has 4 divisors (see below), whose sum is σ = 238800. Its totient is φ = 159192.

The previous prime is 198977. The next prime is 198997. The reversal of 198995 is 599891.

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

It is a cyclic number.

It is not a de Polignac number, because 198995 - 2¹⁰ = 197971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198997) 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, 19895 + ... + 19904.

It is an arithmetic number, because the mean of its divisors is an integer number (59700).

2¹⁹⁸⁹⁹⁵ is an apocalyptic number.

198995 is a deficient number, since it is larger than the sum of its proper divisors (39805).

198995 is an equidigital number, since it uses as much as digits as its factorization.

198995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39804.

The product of its digits is 29160, while the sum is 41.

The square root of 198995 is about 446.0885562307. The cubic root of 198995 is about 58.3822356365.

The spelling of 198995 in words is "one hundred ninety-eight thousand, nine hundred ninety-five".