18199 has 2 divisors, whose sum is σ = 18200. Its totient is φ = 18198.

The previous prime is 18191. The next prime is 18211. The reversal of 18199 is 99181.

It is a weak prime.

It is an emirp because it is prime and its reverse (99181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18199 - 2³ = 18191 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9099 + 9100.

It is an arithmetic number, because the mean of its divisors is an integer number (9100).

2¹⁸¹⁹⁹ is an apocalyptic number.

18199 is a deficient number, since it is larger than the sum of its proper divisors (1).

18199 is an equidigital number, since it uses as much as digits as its factorization.

18199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 28.

The square root of 18199 is about 134.9036693348. The cubic root of 18199 is about 26.3036393736.

The spelling of 18199 in words is "eighteen thousand, one hundred ninety-nine".