199841 has 4 divisors (see below), whose sum is σ = 200772. Its totient is φ = 198912.

The previous prime is 199831. The next prime is 199853. The reversal of 199841 is 148991.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 87616 + 112225 = 296^2 + 335^2 .

It is a cyclic number.

It is not a de Polignac number, because 199841 - 2⁶ = 199777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199798 and 199807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41 + ... + 633.

It is an arithmetic number, because the mean of its divisors is an integer number (50193).

2¹⁹⁹⁸⁴¹ is an apocalyptic number.

It is an amenable number.

199841 is a deficient number, since it is larger than the sum of its proper divisors (931).

199841 is an equidigital number, since it uses as much as digits as its factorization.

199841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930.

The product of its digits is 2592, while the sum is 32.

The square root of 199841 is about 447.0357927504. The cubic root of 199841 is about 58.4648533616.

Subtracting from 199841 its sum of digits (32), we obtain a square (199809 = 447²).

It can be divided in two parts, 1998 and 41, that multiplied together give a palindrome (81918).

The spelling of 199841 in words is "one hundred ninety-nine thousand, eight hundred forty-one".