199809606 has 8 divisors (see below), whose sum is σ = 399619224. Its totient is φ = 66603200.

The previous prime is 199809593. The next prime is 199809607. The reversal of 199809606 is 606908991.

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

199809606 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199809607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16650795 + ... + 16650806.

It is an arithmetic number, because the mean of its divisors is an integer number (49952403).

Almost surely, 2^199809606 is an apocalyptic number.

199809606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

199809606 is a wasteful number, since it uses less digits than its factorization.

199809606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33301606.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 199809606 is about 14135.4025765098. The cubic root of 199809606 is about 584.6179169141.

The spelling of 199809606 in words is "one hundred ninety-nine million, eight hundred nine thousand, six hundred six".