544809 has 4 divisors (see below), whose sum is σ = 726416. Its totient is φ = 363204.

The previous prime is 544807. The next prime is 544813. The reversal of 544809 is 908445.

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 544809 - 2¹ = 544807 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 544809.

It is not an unprimeable number, because it can be changed into a prime (544807) 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, 90799 + ... + 90804.

It is an arithmetic number, because the mean of its divisors is an integer number (181604).

2⁵⁴⁴⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

544809 is a deficient number, since it is larger than the sum of its proper divisors (181607).

544809 is a wasteful number, since it uses less digits than its factorization.

544809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181606.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 544809 is about 738.1117801526. Note that the first 3 decimals coincide. The cubic root of 544809 is about 81.6735484043.

The spelling of 544809 in words is "five hundred forty-four thousand, eight hundred nine".