199613668 has 24 divisors (see below), whose sum is σ = 359388344. Its totient is φ = 96940800.

The previous prime is 199613651. The next prime is 199613669. The reversal of 199613668 is 866316991.

It can be written as a sum of positive squares in 4 ways, for example, as 125619264 + 73994404 = 11208^2 + 8602^2 .

It is not an unprimeable number, because it can be changed into a prime (199613669) 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, 150448 + ... + 151768.

Almost surely, 2^199613668 is an apocalyptic number.

It is an amenable number.

199613668 is a deficient number, since it is larger than the sum of its proper divisors (159774676).

199613668 is a wasteful number, since it uses less digits than its factorization.

199613668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383 (or 2381 counting only the distinct ones).

The product of its digits is 419904, while the sum is 49.

The square root of 199613668 is about 14128.4701224159. The cubic root of 199613668 is about 584.4267577214.

The spelling of 199613668 in words is "one hundred ninety-nine million, six hundred thirteen thousand, six hundred sixty-eight".