199908113 has 2 divisors, whose sum is σ = 199908114. Its totient is φ = 199908112.

The previous prime is 199908109. The next prime is 199908131. The reversal of 199908113 is 311809991.

It is a happy number.

Together with next prime (199908131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191075329 + 8832784 = 13823^2 + 2972^2 .

It is an emirp because it is prime and its reverse (311809991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199908113 - 2² = 199908109 is a prime.

It is not a weakly prime, because it can be changed into another prime (199908193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99954056 + 99954057.

It is an arithmetic number, because the mean of its divisors is an integer number (99954057).

Almost surely, 2^199908113 is an apocalyptic number.

It is an amenable number.

199908113 is a deficient number, since it is larger than the sum of its proper divisors (1).

199908113 is an equidigital number, since it uses as much as digits as its factorization.

199908113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 41.

The square root of 199908113 is about 14138.8865544639. The cubic root of 199908113 is about 584.7139741841.

The spelling of 199908113 in words is "one hundred ninety-nine million, nine hundred eight thousand, one hundred thirteen".