489665 has 16 divisors (see below), whose sum is σ = 665280. Its totient is φ = 342720.

The previous prime is 489659. The next prime is 489673. The reversal of 489665 is 566984.

It is not a de Polignac number, because 489665 - 2⁸ = 489409 is a prime.

It is an Ulam number.

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1442 + ... + 1748.

It is an arithmetic number, because the mean of its divisors is an integer number (41580).

2⁴⁸⁹⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

489665 is a deficient number, since it is larger than the sum of its proper divisors (175615).

489665 is a wasteful number, since it uses less digits than its factorization.

489665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352.

The product of its digits is 51840, while the sum is 38.

The square root of 489665 is about 699.7606733734. The cubic root of 489665 is about 78.8193811999.

The spelling of 489665 in words is "four hundred eighty-nine thousand, six hundred sixty-five".