199890307 has 2 divisors, whose sum is σ = 199890308. Its totient is φ = 199890306.

The previous prime is 199890283. The next prime is 199890329. The reversal of 199890307 is 703098991.

199890307 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199890307 - 2⁷ = 199890179 is a prime.

It is a super-2 number, since 2×199890307² = 79912269665108498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (199890367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99945153 + 99945154.

It is an arithmetic number, because the mean of its divisors is an integer number (99945154).

Almost surely, 2^199890307 is an apocalyptic number.

199890307 is a deficient number, since it is larger than the sum of its proper divisors (1).

199890307 is an equidigital number, since it uses as much as digits as its factorization.

199890307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 199890307 is about 14138.2568586088. The cubic root of 199890307 is about 584.6966133310.

The spelling of 199890307 in words is "one hundred ninety-nine million, eight hundred ninety thousand, three hundred seven".