489091 has 4 divisors (see below), whose sum is σ = 490752. Its totient is φ = 487432.

The previous prime is 489061. The next prime is 489101. The reversal of 489091 is 190984.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489091 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256 + ... + 1021.

It is an arithmetic number, because the mean of its divisors is an integer number (122688).

2⁴⁸⁹⁰⁹¹ is an apocalyptic number.

489091 is a deficient number, since it is larger than the sum of its proper divisors (1661).

489091 is a wasteful number, since it uses less digits than its factorization.

489091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 489091 is about 699.3504128833. The cubic root of 489091 is about 78.7885710103.

The spelling of 489091 in words is "four hundred eighty-nine thousand, ninety-one".