199998712 has 16 divisors (see below), whose sum is σ = 394734600. Its totient is φ = 94736160.

The previous prime is 199998707. The next prime is 199998713. The reversal of 199998712 is 217899991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199998713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657739 + ... + 658042.

Almost surely, 2^199998712 is an apocalyptic number.

It is an amenable number.

199998712 is a deficient number, since it is larger than the sum of its proper divisors (194735888).

199998712 is a wasteful number, since it uses less digits than its factorization.

199998712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315806 (or 1315802 counting only the distinct ones).

The product of its digits is 734832, while the sum is 55.

The square root of 199998712 is about 14142.0900859809. The cubic root of 199998712 is about 584.8022922616.

The spelling of 199998712 in words is "one hundred ninety-nine million, nine hundred ninety-eight thousand, seven hundred twelve".