489813989 has 16 divisors (see below), whose sum is σ = 576069120. Its totient is φ = 407741040.

The previous prime is 489813967. The next prime is 489813997. The reversal of 489813989 is 989318984.

It is not a de Polignac number, because 489813989 - 2¹² = 489809893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489813949) 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 15 ways as a sum of consecutive naturals, for example, 49334 + ... + 58424.

It is an arithmetic number, because the mean of its divisors is an integer number (36004320).

Almost surely, 2^489813989 is an apocalyptic number.

It is an amenable number.

489813989 is a deficient number, since it is larger than the sum of its proper divisors (86255131).

489813989 is a wasteful number, since it uses less digits than its factorization.

489813989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9320.

The product of its digits is 4478976, while the sum is 59.

The square root of 489813989 is about 22131.7416621467. The cubic root of 489813989 is about 788.2737444014.

The spelling of 489813989 in words is "four hundred eighty-nine million, eight hundred thirteen thousand, nine hundred eighty-nine".