489978571 has 4 divisors (see below), whose sum is σ = 497291752. Its totient is φ = 482665392.

The previous prime is 489978563. The next prime is 489978583. The reversal of 489978571 is 175879984.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 489978571 - 2³ = 489978563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489978521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3656490 + ... + 3656623.

It is an arithmetic number, because the mean of its divisors is an integer number (124322938).

Almost surely, 2^489978571 is an apocalyptic number.

489978571 is a deficient number, since it is larger than the sum of its proper divisors (7313181).

489978571 is an equidigital number, since it uses as much as digits as its factorization.

489978571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7313180.

The product of its digits is 5080320, while the sum is 58.

The square root of 489978571 is about 22135.4595841153. The cubic root of 489978571 is about 788.3620235878.

The spelling of 489978571 in words is "four hundred eighty-nine million, nine hundred seventy-eight thousand, five hundred seventy-one".