503409 has 8 divisors (see below), whose sum is σ = 692992. Its totient is φ = 324720.

The previous prime is 503407. The next prime is 503413. The reversal of 503409 is 904305.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 503409 - 2¹ = 503407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (503407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2614 + ... + 2799.

It is an arithmetic number, because the mean of its divisors is an integer number (86624).

2⁵⁰³⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

503409 is a deficient number, since it is larger than the sum of its proper divisors (189583).

503409 is a wasteful number, since it uses less digits than its factorization.

503409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5447.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 503409 is about 709.5132134076. The cubic root of 503409 is about 79.5500258696.

The spelling of 503409 in words is "five hundred three thousand, four hundred nine".