489368821 has 12 divisors (see below), whose sum is σ = 510303360. Its totient is φ = 468780480.

The previous prime is 489368809. The next prime is 489368827. The reversal of 489368821 is 128863984.

It is a de Polignac number, because none of the positive numbers 2^k-489368821 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 (489368827) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1451965 + ... + 1452301.

It is an arithmetic number, because the mean of its divisors is an integer number (42525280).

Almost surely, 2^489368821 is an apocalyptic number.

It is an amenable number.

489368821 is a deficient number, since it is larger than the sum of its proper divisors (20934539).

489368821 is an equidigital number, since it uses as much as digits as its factorization.

489368821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 507 counting only the distinct ones).

The product of its digits is 663552, while the sum is 49.

The square root of 489368821 is about 22121.6821467085. The cubic root of 489368821 is about 788.0348641888.

The spelling of 489368821 in words is "four hundred eighty-nine million, three hundred sixty-eight thousand, eight hundred twenty-one".