489012021 has 12 divisors (see below), whose sum is σ = 747900972. Its totient is φ = 306830976.

The previous prime is 489011981. The next prime is 489012031. The reversal of 489012021 is 120210984.

It can be written as a sum of positive squares in 2 ways, for example, as 295496100 + 193515921 = 17190^2 + 13911^2 .

It is not a de Polignac number, because 489012021 - 2¹⁷ = 488880949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489012031) 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, 1597926 + ... + 1598231.

It is an arithmetic number, because the mean of its divisors is an integer number (62325081).

Almost surely, 2^489012021 is an apocalyptic number.

It is an amenable number.

489012021 is a deficient number, since it is larger than the sum of its proper divisors (258888951).

489012021 is a wasteful number, since it uses less digits than its factorization.

489012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3196180 (or 3196177 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 489012021 is about 22113.6161900310. The cubic root of 489012021 is about 787.8432982442.

The spelling of 489012021 in words is "four hundred eighty-nine million, twelve thousand, twenty-one".