199999853 has 2 divisors, whose sum is σ = 199999854. Its totient is φ = 199999852.

The previous prime is 199999841. The next prime is 199999889. The reversal of 199999853 is 358999991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115304644 + 84695209 = 10738^2 + 9203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199999853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199998853) 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, 99999926 + 99999927.

It is an arithmetic number, because the mean of its divisors is an integer number (99999927).

Almost surely, 2^199999853 is an apocalyptic number.

It is an amenable number.

199999853 is a deficient number, since it is larger than the sum of its proper divisors (1).

199999853 is an equidigital number, since it uses as much as digits as its factorization.

199999853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7085880, while the sum is 62.

The square root of 199999853 is about 14142.1304264952. The cubic root of 199999853 is about 584.8034043657.

The spelling of 199999853 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred fifty-three".