494963809 has 2 divisors, whose sum is σ = 494963810. Its totient is φ = 494963808.

The previous prime is 494963801. The next prime is 494963893. The reversal of 494963809 is 908369494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 457104400 + 37859409 = 21380^2 + 6153^2 .

It is a cyclic number.

It is not a de Polignac number, because 494963809 - 2³ = 494963801 is a prime.

It is not a weakly prime, because it can be changed into another prime (494963801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247481904 + 247481905.

It is an arithmetic number, because the mean of its divisors is an integer number (247481905).

Almost surely, 2^494963809 is an apocalyptic number.

It is an amenable number.

494963809 is a deficient number, since it is larger than the sum of its proper divisors (1).

494963809 is an equidigital number, since it uses as much as digits as its factorization.

494963809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 52.

The square root of 494963809 is about 22247.7821141794. The cubic root of 494963809 is about 791.0267102602.

The spelling of 494963809 in words is "four hundred ninety-four million, nine hundred sixty-three thousand, eight hundred nine".