199100 has 36 divisors (see below), whose sum is σ = 473928. Its totient is φ = 72000.

The previous prime is 199081. The next prime is 199103. The reversal of 199100 is 1991.

199100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1010 + ... + 1190.

2¹⁹⁹¹⁰⁰ is an apocalyptic number.

199100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236964).

199100 is an abundant number, since it is smaller than the sum of its proper divisors (274828).

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

199100 is a wasteful number, since it uses less digits than its factorization.

199100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 199100 is about 446.2062303465. The cubic root of 199100 is about 58.3925023214.

Multiplying 199100 by its reverse (1991), we get a square (396408100 = 19910²).

199100 divided by its reverse (1991) gives a square (100 = 10²).

It can be divided in two parts, 19 and 9100, that added together give a palindrome (9119).

The spelling of 199100 in words is "one hundred ninety-nine thousand, one hundred".