489891 has 8 divisors (see below), whose sum is σ = 664144. Its totient is φ = 321120.

The previous prime is 489887. The next prime is 489901. The reversal of 489891 is 198984.

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

It is not a de Polignac number, because 489891 - 2² = 489887 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489851) 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, 1156 + ... + 1521.

It is an arithmetic number, because the mean of its divisors is an integer number (83018).

2⁴⁸⁹⁸⁹¹ is an apocalyptic number.

489891 is a deficient number, since it is larger than the sum of its proper divisors (174253).

489891 is a wasteful number, since it uses less digits than its factorization.

489891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741.

The product of its digits is 20736, while the sum is 39.

The square root of 489891 is about 699.9221385269. The cubic root of 489891 is about 78.8315054347.

The spelling of 489891 in words is "four hundred eighty-nine thousand, eight hundred ninety-one".