199999768 has 8 divisors (see below), whose sum is σ = 374999580. Its totient is φ = 99999880.

The previous prime is 199999759. The next prime is 199999769. The reversal of 199999768 is 867999991.

199999768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199999769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12499978 + ... + 12499993.

Almost surely, 2^199999768 is an apocalyptic number.

It is an amenable number.

199999768 is a deficient number, since it is larger than the sum of its proper divisors (174999812).

199999768 is a wasteful number, since it uses less digits than its factorization.

199999768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24999977 (or 24999973 counting only the distinct ones).

The product of its digits is 19840464, while the sum is 67.

The square root of 199999768 is about 14142.1274212899. The cubic root of 199999768 is about 584.8033215184.

The spelling of 199999768 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, seven hundred sixty-eight".