198994 has 4 divisors (see below), whose sum is σ = 298494. Its totient is φ = 99496.

The previous prime is 198977. The next prime is 198997. The reversal of 198994 is 499891.

198994 is digitally balanced in base 3, 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: 499891 = 7 ⋅71413.

It can be written as a sum of positive squares in only one way, i.e., 164025 + 34969 = 405^2 + 187^2 .

It is a super-2 number, since 2×198994² = 79197224072, which contains 22 as substring.

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 not an unprimeable number, because it can be changed into a prime (198997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49747 + ... + 49750.

2¹⁹⁸⁹⁹⁴ is an apocalyptic number.

198994 is a deficient number, since it is larger than the sum of its proper divisors (99500).

198994 is an equidigital number, since it uses as much as digits as its factorization.

198994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99499.

The product of its digits is 23328, while the sum is 40.

The square root of 198994 is about 446.0874353756. The cubic root of 198994 is about 58.3821378412.

It can be divided in two parts, 1989 and 94, that multiplied together give a triangular number (186966 = T₆₁₁).

The spelling of 198994 in words is "one hundred ninety-eight thousand, nine hundred ninety-four".