489568209 has 16 divisors (see below), whose sum is σ = 705469632. Its totient is φ = 300201408.

The previous prime is 489568207. The next prime is 489568223. The reversal of 489568209 is 902865984.

It is not a de Polignac number, because 489568209 - 2¹ = 489568207 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (489568207) 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 15 ways as a sum of consecutive naturals, for example, 11142 + ... + 33215.

It is an arithmetic number, because the mean of its divisors is an integer number (44091852).

Almost surely, 2^489568209 is an apocalyptic number.

It is an amenable number.

489568209 is a deficient number, since it is larger than the sum of its proper divisors (215901423).

489568209 is a wasteful number, since it uses less digits than its factorization.

489568209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44656.

The product of its (nonzero) digits is 1244160, while the sum is 51.

The square root of 489568209 is about 22126.1883070718. The cubic root of 489568209 is about 788.1418750662.

The spelling of 489568209 in words is "four hundred eighty-nine million, five hundred sixty-eight thousand, two hundred nine".