199999841 has 2 divisors, whose sum is σ = 199999842. Its totient is φ = 199999840.

The previous prime is 199999831. The next prime is 199999853. The reversal of 199999841 is 148999991.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174345616 + 25654225 = 13204^2 + 5065^2 .

It is a cyclic number.

It is not a de Polignac number, because 199999841 - 2⁶ = 199999777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199999831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99999920 + 99999921.

It is an arithmetic number, because the mean of its divisors is an integer number (99999921).

Almost surely, 2^199999841 is an apocalyptic number.

It is an amenable number.

199999841 is a deficient number, since it is larger than the sum of its proper divisors (1).

199999841 is an equidigital number, since it uses as much as digits as its factorization.

199999841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 59.

The square root of 199999841 is about 14142.1300022309. The cubic root of 199999841 is about 584.8033926696.

It can be divided in two parts, 1999998 and 41, that multiplied together give a palindrome (81999918).

The spelling of 199999841 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred forty-one".