508409 has 4 divisors (see below), whose sum is σ = 554640. Its totient is φ = 462180.

The previous prime is 508393. The next prime is 508433. The reversal of 508409 is 904805.

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 508409 - 2⁴ = 508393 is a prime.

It is a super-2 number, since 2×508409² = 516959422562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (508439) 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, 23099 + ... + 23120.

It is an arithmetic number, because the mean of its divisors is an integer number (138660).

2⁵⁰⁸⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

508409 is a deficient number, since it is larger than the sum of its proper divisors (46231).

508409 is a wasteful number, since it uses less digits than its factorization.

508409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46230.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 508409 is about 713.0280499391. The cubic root of 508409 is about 79.8125297796.

The spelling of 508409 in words is "five hundred eight thousand, four hundred nine".