199606943 has 2 divisors, whose sum is σ = 199606944. Its totient is φ = 199606942.

The previous prime is 199606937. The next prime is 199607011. The reversal of 199606943 is 349606991.

It is a weak prime.

It is an emirp because it is prime and its reverse (349606991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199606943 - 2⁶ = 199606879 is a prime.

It is a super-3 number, since 3×199606943³ (a number of 26 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199606243) 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, 99803471 + 99803472.

It is an arithmetic number, because the mean of its divisors is an integer number (99803472).

Almost surely, 2^199606943 is an apocalyptic number.

199606943 is a deficient number, since it is larger than the sum of its proper divisors (1).

199606943 is an equidigital number, since it uses as much as digits as its factorization.

199606943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 199606943 is about 14128.2321257828. The cubic root of 199606943 is about 584.4201945200.

The spelling of 199606943 in words is "one hundred ninety-nine million, six hundred six thousand, nine hundred forty-three".