508609 has 4 divisors (see below), whose sum is σ = 511060. Its totient is φ = 506160.

The previous prime is 508583. The next prime is 508619. The reversal of 508609 is 906805.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906805 = 5 ⋅181361.

It can be written as a sum of positive squares in 2 ways, for example, as 418609 + 90000 = 647^2 + 300^2 .

It is a cyclic number.

It is not a de Polignac number, because 508609 - 2⁵ = 508577 is a prime.

It is a super-2 number, since 2×508609² = 517366229762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (508619) 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, 882 + ... + 1339.

It is an arithmetic number, because the mean of its divisors is an integer number (127765).

2⁵⁰⁸⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

508609 is a deficient number, since it is larger than the sum of its proper divisors (2451).

508609 is a wasteful number, since it uses less digits than its factorization.

508609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 508609 is about 713.1682830861. The cubic root of 508609 is about 79.8229940668.

The spelling of 508609 in words is "five hundred eight thousand, six hundred nine".