489609 has 6 divisors (see below), whose sum is σ = 707226. Its totient is φ = 326400.

The previous prime is 489571. The next prime is 489613. The reversal of 489609 is 906984.

489609 is a `hidden beast` number, since 48 + 9 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 451584 + 38025 = 672^2 + 195^2 .

It is not a de Polignac number, because 489609 - 2¹¹ = 487561 is a prime.

It is a Curzon number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (489659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27192 + ... + 27209.

It is an arithmetic number, because the mean of its divisors is an integer number (117871).

2⁴⁸⁹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

489609 is a deficient number, since it is larger than the sum of its proper divisors (217617).

489609 is a wasteful number, since it uses less digits than its factorization.

489609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54407 (or 54404 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 489609 is about 699.7206585488. The cubic root of 489609 is about 78.8163763880.

The spelling of 489609 in words is "four hundred eighty-nine thousand, six hundred nine".