199983318 has 16 divisors (see below), whose sum is σ = 400787136. Its totient is φ = 66524360.

The previous prime is 199983317. The next prime is 199983349. The reversal of 199983318 is 813389991.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199983317) 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, 30996 + ... + 36887.

It is an arithmetic number, because the mean of its divisors is an integer number (25049196).

Almost surely, 2^199983318 is an apocalyptic number.

199983318 is an abundant number, since it is smaller than the sum of its proper divisors (200803818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199983318 is a wasteful number, since it uses less digits than its factorization.

199983318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68379.

The product of its digits is 419904, while the sum is 51.

The square root of 199983318 is about 14141.5458136655. The cubic root of 199983318 is about 584.7872877025.

The spelling of 199983318 in words is "one hundred ninety-nine million, nine hundred eighty-three thousand, three hundred eighteen".