489845717 has 2 divisors, whose sum is σ = 489845718. Its totient is φ = 489845716.

The previous prime is 489845711. The next prime is 489845747. The reversal of 489845717 is 717548984.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251729956 + 238115761 = 15866^2 + 15431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489845717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489845711) 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 as a sum of consecutive naturals, namely, 244922858 + 244922859.

It is an arithmetic number, because the mean of its divisors is an integer number (244922859).

Almost surely, 2^489845717 is an apocalyptic number.

It is an amenable number.

489845717 is a deficient number, since it is larger than the sum of its proper divisors (1).

489845717 is an equidigital number, since it uses as much as digits as its factorization.

489845717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2257920, while the sum is 53.

The square root of 489845717 is about 22132.4584490743. The cubic root of 489845717 is about 788.2907643382.

The spelling of 489845717 in words is "four hundred eighty-nine million, eight hundred forty-five thousand, seven hundred seventeen".