199000985 has 8 divisors (see below), whose sum is σ = 245255496. Its totient is φ = 154897920.

The previous prime is 199000981. The next prime is 199001009. The reversal of 199000985 is 589000991.

It can be written as a sum of positive squares in 4 ways, for example, as 84254041 + 114746944 = 9179^2 + 10712^2 .

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

It is not a de Polignac number, because 199000985 - 2² = 199000981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199000981) 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, 537656 + ... + 538025.

It is an arithmetic number, because the mean of its divisors is an integer number (30656937).

Almost surely, 2^199000985 is an apocalyptic number.

It is an amenable number.

199000985 is a deficient number, since it is larger than the sum of its proper divisors (46254511).

199000985 is a wasteful number, since it uses less digits than its factorization.

199000985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075723.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 199000985 is about 14106.7708920220. The cubic root of 199000985 is about 583.8282093459.

The spelling of 199000985 in words is "one hundred ninety-nine million, nine hundred eighty-five", and thus it is an aban number.