489523621 has 2 divisors, whose sum is σ = 489523622. Its totient is φ = 489523620.

The previous prime is 489523613. The next prime is 489523627. The reversal of 489523621 is 126325984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 446476900 + 43046721 = 21130^2 + 6561^2 .

It is a cyclic number.

It is not a de Polignac number, because 489523621 - 2³ = 489523613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489523627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244761810 + 244761811.

It is an arithmetic number, because the mean of its divisors is an integer number (244761811).

Almost surely, 2^489523621 is an apocalyptic number.

It is an amenable number.

489523621 is a deficient number, since it is larger than the sum of its proper divisors (1).

489523621 is an equidigital number, since it uses as much as digits as its factorization.

489523621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 489523621 is about 22125.1806998271. The cubic root of 489523621 is about 788.1179473572.

The spelling of 489523621 in words is "four hundred eighty-nine million, five hundred twenty-three thousand, six hundred twenty-one".