489709 has 4 divisors (see below), whose sum is σ = 534240. Its totient is φ = 445180.

The previous prime is 489691. The next prime is 489733. The reversal of 489709 is 907984.

It is a happy number.

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 489709 - 2⁵ = 489677 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22249 + ... + 22270.

It is an arithmetic number, because the mean of its divisors is an integer number (133560).

2⁴⁸⁹⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

489709 is a deficient number, since it is larger than the sum of its proper divisors (44531).

489709 is a wasteful number, since it uses less digits than its factorization.

489709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44530.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 489709 is about 699.7921119876. The cubic root of 489709 is about 78.8217419628.

The spelling of 489709 in words is "four hundred eighty-nine thousand, seven hundred nine".