489959991 has 24 divisors (see below), whose sum is σ = 742551680. Its totient is φ = 310910400.

The previous prime is 489959971. The next prime is 489959993. The reversal of 489959991 is 199959984.

It is not a de Polignac number, because 489959991 - 2¹⁰ = 489958967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489959993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2625 + ... + 31413.

Almost surely, 2^489959991 is an apocalyptic number.

489959991 is a deficient number, since it is larger than the sum of its proper divisors (252591689).

489959991 is a wasteful number, since it uses less digits than its factorization.

489959991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28887 (or 28884 counting only the distinct ones).

The product of its digits is 9447840, while the sum is 63.

The square root of 489959991 is about 22135.0398915385. The cubic root of 489959991 is about 788.3520585591.

The spelling of 489959991 in words is "four hundred eighty-nine million, nine hundred fifty-nine thousand, nine hundred ninety-one".