199688863 has 8 divisors (see below), whose sum is σ = 221535360. Its totient is φ = 178457880.

The previous prime is 199688837. The next prime is 199688869. The reversal of 199688863 is 368886991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199688863 - 2⁹ = 199688351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199688798 and 199688807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199688869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153195 + ... + 154492.

It is an arithmetic number, because the mean of its divisors is an integer number (27691920).

Almost surely, 2^199688863 is an apocalyptic number.

199688863 is a deficient number, since it is larger than the sum of its proper divisors (21846497).

199688863 is a wasteful number, since it uses less digits than its factorization.

199688863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307757.

The product of its digits is 4478976, while the sum is 58.

The square root of 199688863 is about 14131.1309879995. The cubic root of 199688863 is about 584.5001335469.

The spelling of 199688863 in words is "one hundred ninety-nine million, six hundred eighty-eight thousand, eight hundred sixty-three".