494803809 has 10 divisors (see below), whose sum is σ = 739151490. Its totient is φ = 329869152.

The previous prime is 494803789. The next prime is 494803817. The reversal of 494803809 is 908308494.

It is a happy number.

494803809 is a `hidden beast` number, since 494 + 80 + 3 + 80 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 430355025 + 64448784 = 20745^2 + 8028^2 .

It is not a de Polignac number, because 494803809 - 2¹³ = 494795617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (494803889) 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 in 9 ways as a sum of consecutive naturals, for example, 3054264 + ... + 3054425.

It is an arithmetic number, because the mean of its divisors is an integer number (73915149).

Almost surely, 2^494803809 is an apocalyptic number.

It is an amenable number.

494803809 is a deficient number, since it is larger than the sum of its proper divisors (244347681).

494803809 is an equidigital number, since it uses as much as digits as its factorization.

494803809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6108701 (or 6108692 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 494803809 is about 22244.1859594816. The cubic root of 494803809 is about 790.9414663755.

The spelling of 494803809 in words is "four hundred ninety-four million, eight hundred three thousand, eight hundred nine".