489971999 has 8 divisors (see below), whose sum is σ = 534736080. Its totient is φ = 445244800.

The previous prime is 489971917. The next prime is 489972031. The reversal of 489971999 is 999179984.

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

It is not a de Polignac number, because 489971999 - 2²⁰ = 488923423 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 (489971299) 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, 23687 + ... + 39255.

It is an arithmetic number, because the mean of its divisors is an integer number (66842010).

Almost surely, 2^489971999 is an apocalyptic number.

489971999 is a deficient number, since it is larger than the sum of its proper divisors (44764081).

489971999 is a wasteful number, since it uses less digits than its factorization.

489971999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18441.

The product of its digits is 13226976, while the sum is 65.

The square root of 489971999 is about 22135.3111340229. The cubic root of 489971999 is about 788.3584988497.

The spelling of 489971999 in words is "four hundred eighty-nine million, nine hundred seventy-one thousand, nine hundred ninety-nine".