489887669 has 2 divisors, whose sum is σ = 489887670. Its totient is φ = 489887668.

The previous prime is 489887617. The next prime is 489887681. The reversal of 489887669 is 966788984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 485320900 + 4566769 = 22030^2 + 2137^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489887669 is a prime.

It is a super-2 number, since 2×489887669² = 479979856476507122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489887609) 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, 244943834 + 244943835.

It is an arithmetic number, because the mean of its divisors is an integer number (244943835).

Almost surely, 2^489887669 is an apocalyptic number.

It is an amenable number.

489887669 is a deficient number, since it is larger than the sum of its proper divisors (1).

489887669 is an equidigital number, since it uses as much as digits as its factorization.

489887669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41803776, while the sum is 65.

The square root of 489887669 is about 22133.4061770890. The cubic root of 489887669 is about 788.3132676346.

The spelling of 489887669 in words is "four hundred eighty-nine million, eight hundred eighty-seven thousand, six hundred sixty-nine".