199987063 has 2 divisors, whose sum is σ = 199987064. Its totient is φ = 199987062.

The previous prime is 199987057. The next prime is 199987087. The reversal of 199987063 is 360789991.

It is a weak prime.

It is an emirp because it is prime and its reverse (360789991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199987063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199987063.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199987003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99993531 + 99993532.

It is an arithmetic number, because the mean of its divisors is an integer number (99993532).

Almost surely, 2^199987063 is an apocalyptic number.

199987063 is a deficient number, since it is larger than the sum of its proper divisors (1).

199987063 is an equidigital number, since it uses as much as digits as its factorization.

199987063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 199987063 is about 14141.6782243127. The cubic root of 199987063 is about 584.7909380315.

The spelling of 199987063 in words is "one hundred ninety-nine million, nine hundred eighty-seven thousand, sixty-three".