199416281 has 2 divisors, whose sum is σ = 199416282. Its totient is φ = 199416280.

The previous prime is 199416271. The next prime is 199416293. The reversal of 199416281 is 182614991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181818256 + 17598025 = 13484^2 + 4195^2 .

It is a cyclic number.

It is not a de Polignac number, because 199416281 - 2¹⁰ = 199415257 is a prime.

It is a super-2 number, since 2×199416281² = 79533706255741922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (199416271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99708140 + 99708141.

It is an arithmetic number, because the mean of its divisors is an integer number (99708141).

Almost surely, 2^199416281 is an apocalyptic number.

It is an amenable number.

199416281 is a deficient number, since it is larger than the sum of its proper divisors (1).

199416281 is an equidigital number, since it uses as much as digits as its factorization.

199416281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 41.

The square root of 199416281 is about 14121.4829603693. The cubic root of 199416281 is about 584.2340583431.

The spelling of 199416281 in words is "one hundred ninety-nine million, four hundred sixteen thousand, two hundred eighty-one".