503421409 has 4 divisors (see below), whose sum is σ = 503502016. Its totient is φ = 503340804.

The previous prime is 503421403. The next prime is 503421439. The reversal of 503421409 is 904124305.

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 503421409 - 2²³ = 495032801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (503421403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30069 + ... + 43714.

It is an arithmetic number, because the mean of its divisors is an integer number (125875504).

Almost surely, 2^503421409 is an apocalyptic number.

It is an amenable number.

503421409 is a deficient number, since it is larger than the sum of its proper divisors (80607).

503421409 is an equidigital number, since it uses as much as digits as its factorization.

503421409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80606.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 503421409 is about 22437.0543744049. The cubic root of 503421409 is about 795.5067949863.

The spelling of 503421409 in words is "five hundred three million, four hundred twenty-one thousand, four hundred nine".