199863 has 12 divisors (see below), whose sum is σ = 294840. Its totient is φ = 130416.

The previous prime is 199853. The next prime is 199873. The reversal of 199863 is 368991.

It is an interprime number because it is at equal distance from previous prime (199853) and next prime (199873).

It is not a de Polignac number, because 199863 - 2⁵ = 199831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 268 + ... + 686.

It is an arithmetic number, because the mean of its divisors is an integer number (24570).

2¹⁹⁹⁸⁶³ is an apocalyptic number.

199863 is a deficient number, since it is larger than the sum of its proper divisors (94977).

199863 is a wasteful number, since it uses less digits than its factorization.

199863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 475 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 199863 is about 447.0603986040. The cubic root of 199863 is about 58.4669986998.

The spelling of 199863 in words is "one hundred ninety-nine thousand, eight hundred sixty-three".