199999963 has 2 divisors, whose sum is σ = 199999964. Its totient is φ = 199999962.

The previous prime is 199999957. The next prime is 199999991. The reversal of 199999963 is 369999991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199999963 - 2⁵ = 199999931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199999895 and 199999904.

It is not a weakly prime, because it can be changed into another prime (199999903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99999981 + 99999982.

It is an arithmetic number, because the mean of its divisors is an integer number (99999982).

Almost surely, 2^199999963 is an apocalyptic number.

199999963 is a deficient number, since it is larger than the sum of its proper divisors (1).

199999963 is an equidigital number, since it uses as much as digits as its factorization.

199999963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9565938, while the sum is 64.

The square root of 199999963 is about 14142.1343155833. The cubic root of 199999963 is about 584.8035115797.

The spelling of 199999963 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred sixty-three".