198899 has 2 divisors, whose sum is σ = 198900. Its totient is φ = 198898.

The previous prime is 198859. The next prime is 198901. The reversal of 198899 is 998891.

198899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198899 is a prime.

It is a Sophie Germain prime.

Together with 198901, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (198829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99449 + 99450.

It is an arithmetic number, because the mean of its divisors is an integer number (99450).

2¹⁹⁸⁸⁹⁹ is an apocalyptic number.

198899 is a deficient number, since it is larger than the sum of its proper divisors (1).

198899 is an equidigital number, since it uses as much as digits as its factorization.

198899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 44.

The square root of 198899 is about 445.9809412968. The cubic root of 198899 is about 58.3728457923.

The spelling of 198899 in words is "one hundred ninety-eight thousand, eight hundred ninety-nine".