199929811 has 2 divisors, whose sum is σ = 199929812. Its totient is φ = 199929810.

The previous prime is 199929797. The next prime is 199929859. The reversal of 199929811 is 118929991.

It is a weak prime.

It is an emirp because it is prime and its reverse (118929991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199929811 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199929311) 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, 99964905 + 99964906.

It is an arithmetic number, because the mean of its divisors is an integer number (99964906).

Almost surely, 2^199929811 is an apocalyptic number.

199929811 is a deficient number, since it is larger than the sum of its proper divisors (1).

199929811 is an equidigital number, since it uses as much as digits as its factorization.

199929811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 49.

The square root of 199929811 is about 14139.6538500771. The cubic root of 199929811 is about 584.7351283445.

The spelling of 199929811 in words is "one hundred ninety-nine million, nine hundred twenty-nine thousand, eight hundred eleven".