489660009 has 4 divisors (see below), whose sum is σ = 652880016. Its totient is φ = 326440004.

The previous prime is 489659969. The next prime is 489660011. The reversal of 489660009 is 900066984.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 489660009 - 2⁷ = 489659881 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (489660209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81609999 + ... + 81610004.

It is an arithmetic number, because the mean of its divisors is an integer number (163220004).

Almost surely, 2^489660009 is an apocalyptic number.

It is an amenable number.

489660009 is a deficient number, since it is larger than the sum of its proper divisors (163220007).

489660009 is a wasteful number, since it uses less digits than its factorization.

489660009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163220006.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 489660009 is about 22128.2626746882. The cubic root of 489660009 is about 788.1911340533.

The spelling of 489660009 in words is "four hundred eighty-nine million, six hundred sixty thousand, nine".