199794811 has 2 divisors, whose sum is σ = 199794812. Its totient is φ = 199794810.

The previous prime is 199794809. The next prime is 199794817. The reversal of 199794811 is 118497991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199794811 - 2¹ = 199794809 is a prime.

Together with 199794809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (199794817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99897405 + 99897406.

It is an arithmetic number, because the mean of its divisors is an integer number (99897406).

Almost surely, 2^199794811 is an apocalyptic number.

199794811 is a deficient number, since it is larger than the sum of its proper divisors (1).

199794811 is an equidigital number, since it uses as much as digits as its factorization.

199794811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 49.

The square root of 199794811 is about 14134.8792354233. The cubic root of 199794811 is about 584.6034871180.

The spelling of 199794811 in words is "one hundred ninety-nine million, seven hundred ninety-four thousand, eight hundred eleven".