489381 has 4 divisors (see below), whose sum is σ = 652512. Its totient is φ = 326252.

The previous prime is 489367. The next prime is 489389. The reversal of 489381 is 183984.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 489381 - 2¹⁵ = 456613 is a prime.

It is a super-2 number, since 2×489381² = 478987526322, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81561 + ... + 81566.

It is an arithmetic number, because the mean of its divisors is an integer number (163128).

2⁴⁸⁹³⁸¹ is an apocalyptic number.

It is an amenable number.

489381 is a deficient number, since it is larger than the sum of its proper divisors (163131).

489381 is a wasteful number, since it uses less digits than its factorization.

489381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163130.

The product of its digits is 6912, while the sum is 33.

The square root of 489381 is about 699.5577174187. The cubic root of 489381 is about 78.8041401451.

The spelling of 489381 in words is "four hundred eighty-nine thousand, three hundred eighty-one".