199983727 has 2 divisors, whose sum is σ = 199983728. Its totient is φ = 199983726.

The previous prime is 199983709. The next prime is 199983757. The reversal of 199983727 is 727389991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199983727 - 2¹¹ = 199981679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199983757) 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, 99991863 + 99991864.

It is an arithmetic number, because the mean of its divisors is an integer number (99991864).

Almost surely, 2^199983727 is an apocalyptic number.

199983727 is a deficient number, since it is larger than the sum of its proper divisors (1).

199983727 is an equidigital number, since it uses as much as digits as its factorization.

199983727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 55.

The square root of 199983727 is about 14141.5602745949. The cubic root of 199983727 is about 584.7876863655.

It can be divided in two parts, 19 and 9983727, that added together give a triangular number (9983746 = T₄₄₆₈).

The spelling of 199983727 in words is "one hundred ninety-nine million, nine hundred eighty-three thousand, seven hundred twenty-seven".