199684829 has 2 divisors, whose sum is σ = 199684830. Its totient is φ = 199684828.

The previous prime is 199684799. The next prime is 199684841. The reversal of 199684829 is 928486991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198753604 + 931225 = 14098^2 + 965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199684829 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199681829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99842414 + 99842415.

It is an arithmetic number, because the mean of its divisors is an integer number (99842415).

Almost surely, 2^199684829 is an apocalyptic number.

It is an amenable number.

199684829 is a deficient number, since it is larger than the sum of its proper divisors (1).

199684829 is an equidigital number, since it uses as much as digits as its factorization.

199684829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 56.

The square root of 199684829 is about 14130.9882527727. The cubic root of 199684829 is about 584.4961976081.

The spelling of 199684829 in words is "one hundred ninety-nine million, six hundred eighty-four thousand, eight hundred twenty-nine".