504409 has 4 divisors (see below), whose sum is σ = 512740. Its totient is φ = 496080.

The previous prime is 504403. The next prime is 504457. The reversal of 504409 is 904405.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 225625 + 278784 = 475^2 + 528^2 .

It is a cyclic number.

It is not a de Polignac number, because 504409 - 2⁵ = 504377 is a prime.

It is a Duffinian number.

504409 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 504409.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (504403) 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, 4074 + ... + 4195.

It is an arithmetic number, because the mean of its divisors is an integer number (128185).

2⁵⁰⁴⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

504409 is a deficient number, since it is larger than the sum of its proper divisors (8331).

504409 is an equidigital number, since it uses as much as digits as its factorization.

504409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8330.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 504409 is about 710.2175722974. The cubic root of 504409 is about 79.6026652475.

The spelling of 504409 in words is "five hundred four thousand, four hundred nine".