489391 has 8 divisors (see below), whose sum is σ = 564224. Its totient is φ = 415800.

The previous prime is 489389. The next prime is 489407. The reversal of 489391 is 193984.

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

It is not a de Polignac number, because 489391 - 2¹ = 489389 is a prime.

It is an Ulam number.

It is a Duffinian number.

489391 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489361) 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, 826 + ... + 1288.

It is an arithmetic number, because the mean of its divisors is an integer number (70528).

2⁴⁸⁹³⁹¹ is an apocalyptic number.

489391 is a deficient number, since it is larger than the sum of its proper divisors (74833).

489391 is a wasteful number, since it uses less digits than its factorization.

489391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621.

The product of its digits is 7776, while the sum is 34.

The square root of 489391 is about 699.5648647552. The cubic root of 489391 is about 78.8046769021.

The spelling of 489391 in words is "four hundred eighty-nine thousand, three hundred ninety-one".