481809 has 4 divisors (see below), whose sum is σ = 642416. Its totient is φ = 321204.

The previous prime is 481807. The next prime is 481813. The reversal of 481809 is 908184.

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 not a de Polignac number, because 481809 - 2¹ = 481807 is a prime.

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 (481801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80299 + ... + 80304.

It is an arithmetic number, because the mean of its divisors is an integer number (160604).

2⁴⁸¹⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

481809 is a deficient number, since it is larger than the sum of its proper divisors (160607).

481809 is a wasteful number, since it uses less digits than its factorization.

481809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160606.

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

The square root of 481809 is about 694.1246285790. The cubic root of 481809 is about 78.3955905649.

The spelling of 481809 in words is "four hundred eighty-one thousand, eight hundred nine".