199968607 has 2 divisors, whose sum is σ = 199968608. Its totient is φ = 199968606.

The previous prime is 199968599. The next prime is 199968611. The reversal of 199968607 is 706869991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199968607 - 2³ = 199968599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199968617) 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 as a sum of consecutive naturals, namely, 99984303 + 99984304.

It is an arithmetic number, because the mean of its divisors is an integer number (99984304).

Almost surely, 2^199968607 is an apocalyptic number.

199968607 is a deficient number, since it is larger than the sum of its proper divisors (1).

199968607 is an equidigital number, since it uses as much as digits as its factorization.

199968607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The square root of 199968607 is about 14141.0256700142. The cubic root of 199968607 is about 584.7729481452.

The spelling of 199968607 in words is "one hundred ninety-nine million, nine hundred sixty-eight thousand, six hundred seven".