199900 has 18 divisors (see below), whose sum is σ = 434000. Its totient is φ = 79920.

The previous prime is 199889. The next prime is 199909. The reversal of 199900 is 9991.

199900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199909) by changing a digit.

199900 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 900 + ... + 1099.

2¹⁹⁹⁹⁰⁰ is an apocalyptic number.

199900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199900 is an abundant number, since it is smaller than the sum of its proper divisors (234100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199900 is a wasteful number, since it uses less digits than its factorization.

199900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013 (or 2006 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 199900 is about 447.1017781222. The cubic root of 199900 is about 58.4706064136.

The spelling of 199900 in words is "one hundred ninety-nine thousand, nine hundred".