489178521 has 20 divisors (see below), whose sum is σ = 786961252. Its totient is φ = 301032288.

The previous prime is 489178493. The next prime is 489178561. The reversal of 489178521 is 125871984.

It can be written as a sum of positive squares in 2 ways, for example, as 214944921 + 274233600 = 14661^2 + 16560^2 .

It is not a de Polignac number, because 489178521 - 2⁵ = 489178489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489178561) 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 19 ways as a sum of consecutive naturals, for example, 231226 + ... + 233331.

Almost surely, 2^489178521 is an apocalyptic number.

It is an amenable number.

489178521 is a deficient number, since it is larger than the sum of its proper divisors (297782731).

489178521 is a wasteful number, since it uses less digits than its factorization.

489178521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464582 (or 464573 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 489178521 is about 22117.3805184972. The cubic root of 489178521 is about 787.9327036975.

The spelling of 489178521 in words is "four hundred eighty-nine million, one hundred seventy-eight thousand, five hundred twenty-one".