199788291 has 6 divisors (see below), whose sum is σ = 288583100. Its totient is φ = 133192188.

The previous prime is 199788263. The next prime is 199788293. The reversal of 199788291 is 192887991.

It is not a de Polignac number, because 199788291 - 2¹¹ = 199786243 is a prime.

It is a super-2 number, since 2×199788291² = 79830722441401362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199788293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11099341 + ... + 11099358.

Almost surely, 2^199788291 is an apocalyptic number.

199788291 is a deficient number, since it is larger than the sum of its proper divisors (88794809).

199788291 is a wasteful number, since it uses less digits than its factorization.

199788291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22198705 (or 22198702 counting only the distinct ones).

The product of its digits is 653184, while the sum is 54.

The square root of 199788291 is about 14134.6485983911. The cubic root of 199788291 is about 584.5971278334.

The spelling of 199788291 in words is "one hundred ninety-nine million, seven hundred eighty-eight thousand, two hundred ninety-one".