489969617 has 2 divisors, whose sum is σ = 489969618. Its totient is φ = 489969616.

The previous prime is 489969611. The next prime is 489969619. The reversal of 489969617 is 716969984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 488896321 + 1073296 = 22111^2 + 1036^2 .

It is a cyclic number.

It is not a de Polignac number, because 489969617 - 2¹⁰ = 489968593 is a prime.

Together with 489969619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (489969611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244984808 + 244984809.

It is an arithmetic number, because the mean of its divisors is an integer number (244984809).

Almost surely, 2^489969617 is an apocalyptic number.

It is an amenable number.

489969617 is a deficient number, since it is larger than the sum of its proper divisors (1).

489969617 is an equidigital number, since it uses as much as digits as its factorization.

489969617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 59.

The square root of 489969617 is about 22135.2573285246. The cubic root of 489969617 is about 788.3572213121.

The spelling of 489969617 in words is "four hundred eighty-nine million, nine hundred sixty-nine thousand, six hundred seventeen".