489112021 has 2 divisors, whose sum is σ = 489112022. Its totient is φ = 489112020.

The previous prime is 489111979. The next prime is 489112061. The reversal of 489112021 is 120211984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 487923921 + 1188100 = 22089^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 489112021 - 2¹⁹ = 488587733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489112061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244556010 + 244556011.

It is an arithmetic number, because the mean of its divisors is an integer number (244556011).

Almost surely, 2^489112021 is an apocalyptic number.

It is an amenable number.

489112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

489112021 is an equidigital number, since it uses as much as digits as its factorization.

489112021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 489112021 is about 22115.8771248169. The cubic root of 489112021 is about 787.8969976467.

The spelling of 489112021 in words is "four hundred eighty-nine million, one hundred twelve thousand, twenty-one".