199896986 has 16 divisors (see below), whose sum is σ = 316461600. Its totient is φ = 94437648.

The previous prime is 199896947. The next prime is 199896989. The reversal of 199896986 is 689698991.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (199896989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8021 + ... + 21543.

It is an arithmetic number, because the mean of its divisors is an integer number (19778850).

Almost surely, 2^199896986 is an apocalyptic number.

199896986 is a deficient number, since it is larger than the sum of its proper divisors (116564614).

199896986 is a wasteful number, since it uses less digits than its factorization.

199896986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13933.

The product of its digits is 15116544, while the sum is 65.

The square root of 199896986 is about 14138.4930597288. The cubic root of 199896986 is about 584.7031254780.

The spelling of 199896986 in words is "one hundred ninety-nine million, eight hundred ninety-six thousand, nine hundred eighty-six".