199994329 has 2 divisors, whose sum is σ = 199994330. Its totient is φ = 199994328.

The previous prime is 199994297. The next prime is 199994359. The reversal of 199994329 is 923499991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176491225 + 23503104 = 13285^2 + 4848^2 .

It is an emirp because it is prime and its reverse (923499991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199994329 - 2⁵ = 199994297 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199994329.

It is not a weakly prime, because it can be changed into another prime (199994359) 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, 99997164 + 99997165.

It is an arithmetic number, because the mean of its divisors is an integer number (99997165).

Almost surely, 2^199994329 is an apocalyptic number.

It is an amenable number.

199994329 is a deficient number, since it is larger than the sum of its proper divisors (1).

199994329 is an equidigital number, since it uses as much as digits as its factorization.

199994329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1417176, while the sum is 55.

The square root of 199994329 is about 14141.9351221818. The cubic root of 199994329 is about 584.7980202221.

The spelling of 199994329 in words is "one hundred ninety-nine million, nine hundred ninety-four thousand, three hundred twenty-nine".