199902907 has 2 divisors, whose sum is σ = 199902908. Its totient is φ = 199902906.

The previous prime is 199902869. The next prime is 199902929. The reversal of 199902907 is 709209991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199902907 is a prime.

It is a super-2 number, since 2×199902907² = 79922344454101298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (199902977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99951453 + 99951454.

It is an arithmetic number, because the mean of its divisors is an integer number (99951454).

Almost surely, 2^199902907 is an apocalyptic number.

199902907 is a deficient number, since it is larger than the sum of its proper divisors (1).

199902907 is an equidigital number, since it uses as much as digits as its factorization.

199902907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 46.

The square root of 199902907 is about 14138.7024510738. The cubic root of 199902907 is about 584.7088984399.

The spelling of 199902907 in words is "one hundred ninety-nine million, nine hundred two thousand, nine hundred seven".