199985683 has 2 divisors, whose sum is σ = 199985684. Its totient is φ = 199985682.

The previous prime is 199985677. The next prime is 199985689. The reversal of 199985683 is 386589991.

It is a balanced prime because it is at equal distance from previous prime (199985677) and next prime (199985689).

It is an emirp because it is prime and its reverse (386589991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199985683 is a prime.

It is not a weakly prime, because it can be changed into another prime (199985689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99992841 + 99992842.

It is an arithmetic number, because the mean of its divisors is an integer number (99992842).

Almost surely, 2^199985683 is an apocalyptic number.

199985683 is a deficient number, since it is larger than the sum of its proper divisors (1).

199985683 is an equidigital number, since it uses as much as digits as its factorization.

199985683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4199040, while the sum is 58.

The square root of 199985683 is about 14141.6294322825. The cubic root of 199985683 is about 584.7895929223.

The spelling of 199985683 in words is "one hundred ninety-nine million, nine hundred eighty-five thousand, six hundred eighty-three".