489517789 has 2 divisors, whose sum is σ = 489517790. Its totient is φ = 489517788.

The previous prime is 489517783. The next prime is 489517799. The reversal of 489517789 is 987715984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 404693689 + 84824100 = 20117^2 + 9210^2 .

It is a cyclic number.

It is not a de Polignac number, because 489517789 - 2⁵ = 489517757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489517783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244758894 + 244758895.

It is an arithmetic number, because the mean of its divisors is an integer number (244758895).

Almost surely, 2^489517789 is an apocalyptic number.

It is an amenable number.

489517789 is a deficient number, since it is larger than the sum of its proper divisors (1).

489517789 is an equidigital number, since it uses as much as digits as its factorization.

489517789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 58.

The square root of 489517789 is about 22125.0489039008. The cubic root of 489517789 is about 788.1148175647.

The spelling of 489517789 in words is "four hundred eighty-nine million, five hundred seventeen thousand, seven hundred eighty-nine".