199193668 has 12 divisors (see below), whose sum is σ = 348731152. Its totient is φ = 99556200.

The previous prime is 199193653. The next prime is 199193669. The reversal of 199193668 is 866391991.

It is not an unprimeable number, because it can be changed into a prime (199193669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2671 + ... + 20137.

Almost surely, 2^199193668 is an apocalyptic number.

It is an amenable number.

199193668 is a deficient number, since it is larger than the sum of its proper divisors (149537484).

199193668 is a wasteful number, since it uses less digits than its factorization.

199193668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20322 (or 20320 counting only the distinct ones).

The product of its digits is 629856, while the sum is 52.

The square root of 199193668 is about 14113.5986906246. The cubic root of 199193668 is about 584.0165794067.

It can be divided in two parts, 1991 and 93668, that added together give a palindrome (95659).

The spelling of 199193668 in words is "one hundred ninety-nine million, one hundred ninety-three thousand, six hundred sixty-eight".