489747989 has 8 divisors (see below), whose sum is σ = 501049152. Its totient is φ = 478569280.

The previous prime is 489747919. The next prime is 489747991. The reversal of 489747989 is 989747984.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489747989 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 (489747919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22499 + ... + 38544.

It is an arithmetic number, because the mean of its divisors is an integer number (62631144).

Almost surely, 2^489747989 is an apocalyptic number.

It is an amenable number.

489747989 is a deficient number, since it is larger than the sum of its proper divisors (11301163).

489747989 is a wasteful number, since it uses less digits than its factorization.

489747989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61227.

The product of its digits is 36578304, while the sum is 65.

The square root of 489747989 is about 22130.2505408321. The cubic root of 489747989 is about 788.2383374883.

The spelling of 489747989 in words is "four hundred eighty-nine million, seven hundred forty-seven thousand, nine hundred eighty-nine".