199968599 has 2 divisors, whose sum is σ = 199968600. Its totient is φ = 199968598.

The previous prime is 199968583. The next prime is 199968607. The reversal of 199968599 is 995869991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199968599 - 2⁴ = 199968583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199968539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99984299 + 99984300.

It is an arithmetic number, because the mean of its divisors is an integer number (99984300).

Almost surely, 2^199968599 is an apocalyptic number.

199968599 is a deficient number, since it is larger than the sum of its proper divisors (1).

199968599 is an equidigital number, since it uses as much as digits as its factorization.

199968599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14171760, while the sum is 65.

The square root of 199968599 is about 14141.0253871493. The cubic root of 199968599 is about 584.7729403470.

The spelling of 199968599 in words is "one hundred ninety-nine million, nine hundred sixty-eight thousand, five hundred ninety-nine".