199980812 has 12 divisors (see below), whose sum is σ = 350725536. Its totient is φ = 99773520.

The previous prime is 199980811. The next prime is 199980841. The reversal of 199980812 is 218089991.

It is not an unprimeable number, because it can be changed into a prime (199980811) 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 3 ways as a sum of consecutive naturals, for example, 52139 + ... + 55842.

It is an arithmetic number, because the mean of its divisors is an integer number (29227128).

Almost surely, 2^199980812 is an apocalyptic number.

It is an amenable number.

199980812 is a deficient number, since it is larger than the sum of its proper divisors (150744724).

199980812 is a wasteful number, since it uses less digits than its factorization.

199980812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108448 (or 108446 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 47.

The square root of 199980812 is about 14141.4572092129. The cubic root of 199980812 is about 584.7848450270.

The spelling of 199980812 in words is "one hundred ninety-nine million, nine hundred eighty thousand, eight hundred twelve".