489081 has 4 divisors (see below), whose sum is σ = 652112. Its totient is φ = 326052.

The previous prime is 489061. The next prime is 489101. The reversal of 489081 is 180984.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (489061) and next prime (489101).

It is not a de Polignac number, because 489081 - 2¹⁰ = 488057 is a prime.

It is a super-2 number, since 2×489081² = 478400449122, which contains 22 as substring.

It is an Ulam number.

It is a D-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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81511 + ... + 81516.

It is an arithmetic number, because the mean of its divisors is an integer number (163028).

2⁴⁸⁹⁰⁸¹ is an apocalyptic number.

It is an amenable number.

489081 is a deficient number, since it is larger than the sum of its proper divisors (163031).

489081 is a wasteful number, since it uses less digits than its factorization.

489081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163030.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 489081 is about 699.3432633550. The cubic root of 489081 is about 78.7880340338.

The spelling of 489081 in words is "four hundred eighty-nine thousand, eighty-one".