199082309 has 2 divisors, whose sum is σ = 199082310. Its totient is φ = 199082308.

The previous prime is 199082297. The next prime is 199082339. The reversal of 199082309 is 903280991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134328100 + 64754209 = 11590^2 + 8047^2 .

It is an emirp because it is prime and its reverse (903280991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199082309 - 2²⁰ = 198033733 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199082339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99541154 + 99541155.

It is an arithmetic number, because the mean of its divisors is an integer number (99541155).

Almost surely, 2^199082309 is an apocalyptic number.

It is an amenable number.

199082309 is a deficient number, since it is larger than the sum of its proper divisors (1).

199082309 is an equidigital number, since it uses as much as digits as its factorization.

199082309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 199082309 is about 14109.6530432183. The cubic root of 199082309 is about 583.9077278453.

The spelling of 199082309 in words is "one hundred ninety-nine million, eighty-two thousand, three hundred nine".