199695911 has 2 divisors, whose sum is σ = 199695912. Its totient is φ = 199695910.

The previous prime is 199695901. The next prime is 199695917. The reversal of 199695911 is 119596991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199695911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199695911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199695917) 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, 99847955 + 99847956.

It is an arithmetic number, because the mean of its divisors is an integer number (99847956).

Almost surely, 2^199695911 is an apocalyptic number.

199695911 is a deficient number, since it is larger than the sum of its proper divisors (1).

199695911 is an equidigital number, since it uses as much as digits as its factorization.

199695911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 196830, while the sum is 50.

The square root of 199695911 is about 14131.3803642815. The cubic root of 199695911 is about 584.5070100921.

The spelling of 199695911 in words is "one hundred ninety-nine million, six hundred ninety-five thousand, nine hundred eleven".