285068209 has 2 divisors, whose sum is σ = 285068210. Its totient is φ = 285068208.

The previous prime is 285068171. The next prime is 285068213. The reversal of 285068209 is 902860582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216178209 + 68890000 = 14703^2 + 8300^2 .

It is a cyclic number.

It is not a de Polignac number, because 285068209 - 2⁷ = 285068081 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (285068249) 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, 142534104 + 142534105.

It is an arithmetic number, because the mean of its divisors is an integer number (142534105).

Almost surely, 2^285068209 is an apocalyptic number.

It is an amenable number.

285068209 is a deficient number, since it is larger than the sum of its proper divisors (1).

285068209 is an equidigital number, since it uses as much as digits as its factorization.

285068209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 285068209 is about 16883.9630715066. The cubic root of 285068209 is about 658.1369320807.

The spelling of 285068209 in words is "two hundred eighty-five million, sixty-eight thousand, two hundred nine".