489987999 has 6 divisors (see below), whose sum is σ = 707760456. Its totient is φ = 326658660.

The previous prime is 489987997. The next prime is 489988039. The reversal of 489987999 is 999789984.

It is not a de Polignac number, because 489987999 - 2¹ = 489987997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489987997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27221547 + ... + 27221564.

It is an arithmetic number, because the mean of its divisors is an integer number (117960076).

Almost surely, 2^489987999 is an apocalyptic number.

489987999 is a deficient number, since it is larger than the sum of its proper divisors (217772457).

489987999 is a wasteful number, since it uses less digits than its factorization.

489987999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54443117 (or 54443114 counting only the distinct ones).

The product of its digits is 105815808, while the sum is 72.

The square root of 489987999 is about 22135.6725445603. The cubic root of 489987999 is about 788.3670800195.

The spelling of 489987999 in words is "four hundred eighty-nine million, nine hundred eighty-seven thousand, nine hundred ninety-nine".