494595209 has 2 divisors, whose sum is σ = 494595210. Its totient is φ = 494595208.

The previous prime is 494595187. The next prime is 494595223. The reversal of 494595209 is 902595494.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 494083984 + 511225 = 22228^2 + 715^2 .

It is a cyclic number.

It is not a de Polignac number, because 494595209 - 2⁸ = 494594953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (494595509) 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, 247297604 + 247297605.

It is an arithmetic number, because the mean of its divisors is an integer number (247297605).

Almost surely, 2^494595209 is an apocalyptic number.

It is an amenable number.

494595209 is a deficient number, since it is larger than the sum of its proper divisors (1).

494595209 is an equidigital number, since it uses as much as digits as its factorization.

494595209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 583200, while the sum is 47.

The square root of 494595209 is about 22239.4965995186. The cubic root of 494595209 is about 790.8303020595.

The spelling of 494595209 in words is "four hundred ninety-four million, five hundred ninety-five thousand, two hundred nine".