198599 has 2 divisors, whose sum is σ = 198600. Its totient is φ = 198598.

The previous prime is 198593. The next prime is 198613. The reversal of 198599 is 995891.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198599 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99299 + 99300.

It is an arithmetic number, because the mean of its divisors is an integer number (99300).

2¹⁹⁸⁵⁹⁹ is an apocalyptic number.

198599 is a deficient number, since it is larger than the sum of its proper divisors (1).

198599 is an equidigital number, since it uses as much as digits as its factorization.

198599 is an evil number, because the sum of its binary digits is even.

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

The square root of 198599 is about 445.6444771340. The cubic root of 198599 is about 58.3434830412.

It can be divided in two parts, 198 and 599, that added together give a palindrome (797).

The spelling of 198599 in words is "one hundred ninety-eight thousand, five hundred ninety-nine".