481989 has 4 divisors (see below), whose sum is σ = 642656. Its totient is φ = 321324.

The previous prime is 481963. The next prime is 481997. The reversal of 481989 is 989184.

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 not a de Polignac number, because 481989 - 2⁷ = 481861 is a prime.

It is a super-2 number, since 2×481989² = 464626792242, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 481989.

It is not an unprimeable number, because it can be changed into a prime (481909) 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, 80329 + ... + 80334.

It is an arithmetic number, because the mean of its divisors is an integer number (160664).

2⁴⁸¹⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

481989 is a deficient number, since it is larger than the sum of its proper divisors (160667).

481989 is a wasteful number, since it uses less digits than its factorization.

481989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160666.

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

The square root of 481989 is about 694.2542761842. The cubic root of 481989 is about 78.4053520052.

The spelling of 481989 in words is "four hundred eighty-one thousand, nine hundred eighty-nine".