489544985 has 4 divisors (see below), whose sum is σ = 587453988. Its totient is φ = 391635984.

The previous prime is 489544973. The next prime is 489545011. The reversal of 489544985 is 589445984.

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 272778256 + 216766729 = 16516^2 + 14723^2 .

It is a cyclic number.

It is not a de Polignac number, because 489544985 - 2⁶ = 489544921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 489544985.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48954494 + ... + 48954503.

It is an arithmetic number, because the mean of its divisors is an integer number (146863497).

Almost surely, 2^489544985 is an apocalyptic number.

It is an amenable number.

489544985 is a deficient number, since it is larger than the sum of its proper divisors (97909003).

489544985 is an equidigital number, since it uses as much as digits as its factorization.

489544985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97909002.

The product of its digits is 8294400, while the sum is 56.

The square root of 489544985 is about 22125.6634928763. The cubic root of 489544985 is about 788.1294123177.

Subtracting 489544985 from its reverse (589445984), we obtain a palindrome (99900999).

The spelling of 489544985 in words is "four hundred eighty-nine million, five hundred forty-four thousand, nine hundred eighty-five".