504040209 has 4 divisors (see below), whose sum is σ = 672053616. Its totient is φ = 336026804.

The previous prime is 504040111. The next prime is 504040211. The reversal of 504040209 is 902040405.

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 a cyclic number.

It is not a de Polignac number, because 504040209 - 2¹³ = 504032017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (504044209) 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, 84006699 + ... + 84006704.

It is an arithmetic number, because the mean of its divisors is an integer number (168013404).

Almost surely, 2^504040209 is an apocalyptic number.

It is an amenable number.

504040209 is a deficient number, since it is larger than the sum of its proper divisors (168013407).

504040209 is a wasteful number, since it uses less digits than its factorization.

504040209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168013406.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 504040209 is about 22450.8398283895. The cubic root of 504040209 is about 795.8326042323.

The spelling of 504040209 in words is "five hundred four million, forty thousand, two hundred nine".