494673209 has 2 divisors, whose sum is σ = 494673210. Its totient is φ = 494673208.

The previous prime is 494673197. The next prime is 494673229. The reversal of 494673209 is 902376494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340218025 + 154455184 = 18445^2 + 12428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-494673209 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 494673209.

It is not a weakly prime, because it can be changed into another prime (494673229) 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, 247336604 + 247336605.

It is an arithmetic number, because the mean of its divisors is an integer number (247336605).

Almost surely, 2^494673209 is an apocalyptic number.

It is an amenable number.

494673209 is a deficient number, since it is larger than the sum of its proper divisors (1).

494673209 is an equidigital number, since it uses as much as digits as its factorization.

494673209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 494673209 is about 22241.2501672006. The cubic root of 494673209 is about 790.8718724320.

The spelling of 494673209 in words is "four hundred ninety-four million, six hundred seventy-three thousand, two hundred nine".