199999308 has 12 divisors (see below), whose sum is σ = 466665080. Its totient is φ = 66666432.

The previous prime is 199999307. The next prime is 199999309. The reversal of 199999308 is 803999991.

It is an interprime number because it is at equal distance from previous prime (199999307) and next prime (199999309).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (199999307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8333293 + ... + 8333316.

Almost surely, 2^199999308 is an apocalyptic number.

It is an amenable number.

199999308 is an abundant number, since it is smaller than the sum of its proper divisors (266665772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199999308 is a wasteful number, since it uses less digits than its factorization.

199999308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16666616 (or 16666614 counting only the distinct ones).

The product of its (nonzero) digits is 1417176, while the sum is 57.

The square root of 199999308 is about 14142.1111578152. Note that the first 4 decimals coincide. The cubic root of 199999308 is about 584.8028731684.

The spelling of 199999308 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, three hundred eight".