489575891 has 4 divisors (see below), whose sum is σ = 559515312. Its totient is φ = 419636472.

The previous prime is 489575851. The next prime is 489575899. The reversal of 489575891 is 198575984.

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 489575891 - 2¹⁰ = 489574867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489575899) 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, 34969700 + ... + 34969713.

It is an arithmetic number, because the mean of its divisors is an integer number (139878828).

Almost surely, 2^489575891 is an apocalyptic number.

489575891 is a deficient number, since it is larger than the sum of its proper divisors (69939421).

489575891 is an equidigital number, since it uses as much as digits as its factorization.

489575891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69939420.

The product of its digits is 3628800, while the sum is 56.

The square root of 489575891 is about 22126.3619015870. The cubic root of 489575891 is about 788.1459973887.

The spelling of 489575891 in words is "four hundred eighty-nine million, five hundred seventy-five thousand, eight hundred ninety-one".