489805 has 4 divisors (see below), whose sum is σ = 587772. Its totient is φ = 391840.

The previous prime is 489803. The next prime is 489817. The reversal of 489805 is 508984.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 142884 + 346921 = 378^2 + 589^2 .

It is not a de Polignac number, because 489805 - 2¹ = 489803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489803) 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, 48976 + ... + 48985.

It is an arithmetic number, because the mean of its divisors is an integer number (146943).

2⁴⁸⁹⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

489805 is a deficient number, since it is larger than the sum of its proper divisors (97967).

489805 is an equidigital number, since it uses as much as digits as its factorization.

489805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97966.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 489805 is about 699.8607004254. The cubic root of 489805 is about 78.8268922274.

The spelling of 489805 in words is "four hundred eighty-nine thousand, eight hundred five".