199665883 has 2 divisors, whose sum is σ = 199665884. Its totient is φ = 199665882.

The previous prime is 199665863. The next prime is 199665911. The reversal of 199665883 is 388566991.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199665883 - 2¹³ = 199657691 is a prime.

It is not a weakly prime, because it can be changed into another prime (199665803) 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, 99832941 + 99832942.

It is an arithmetic number, because the mean of its divisors is an integer number (99832942).

Almost surely, 2^199665883 is an apocalyptic number.

199665883 is a deficient number, since it is larger than the sum of its proper divisors (1).

199665883 is an equidigital number, since it uses as much as digits as its factorization.

199665883 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 55.

The square root of 199665883 is about 14130.3178662053. The cubic root of 199665883 is about 584.4777114513.

The spelling of 199665883 in words is "one hundred ninety-nine million, six hundred sixty-five thousand, eight hundred eighty-three".