199771141 has 2 divisors, whose sum is σ = 199771142. Its totient is φ = 199771140.

The previous prime is 199771139. The next prime is 199771207. The reversal of 199771141 is 141177991.

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., 151413025 + 48358116 = 12305^2 + 6954^2 .

It is a cyclic number.

It is not a de Polignac number, because 199771141 - 2¹ = 199771139 is a prime.

Together with 199771139, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 199771094 and 199771103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199771441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99885570 + 99885571.

It is an arithmetic number, because the mean of its divisors is an integer number (99885571).

Almost surely, 2^199771141 is an apocalyptic number.

It is an amenable number.

199771141 is a deficient number, since it is larger than the sum of its proper divisors (1).

199771141 is an equidigital number, since it uses as much as digits as its factorization.

199771141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 40.

The square root of 199771141 is about 14134.0419201303. The cubic root of 199771141 is about 584.5803999135.

The spelling of 199771141 in words is "one hundred ninety-nine million, seven hundred seventy-one thousand, one hundred forty-one".