199994885 has 8 divisors (see below), whose sum is σ = 254111256. Its totient is φ = 150584320.

The previous prime is 199994881. The next prime is 199994897. The reversal of 199994885 is 588499991.

It can be written as a sum of positive squares in 4 ways, for example, as 8421604 + 191573281 = 2902^2 + 13841^2 .

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

It is not a de Polignac number, because 199994885 - 2² = 199994881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199994881) 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, 1176356 + ... + 1176525.

It is an arithmetic number, because the mean of its divisors is an integer number (31763907).

Almost surely, 2^199994885 is an apocalyptic number.

It is an amenable number.

199994885 is a deficient number, since it is larger than the sum of its proper divisors (54116371).

199994885 is a wasteful number, since it uses less digits than its factorization.

199994885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352903.

The product of its digits is 8398080, while the sum is 62.

The square root of 199994885 is about 14141.9547800154. The cubic root of 199994885 is about 584.7985621498.

The spelling of 199994885 in words is "one hundred ninety-nine million, nine hundred ninety-four thousand, eight hundred eighty-five".