5809

5809 is a natural number that comes after 5808 and before 5810. It is odd and composite, with prime factorization 37 × 157. The primes are distinct, so 5809 is square-free.

Its divisors are 1, 37, 157, and 5809. The sum of its divisors σ(5809) equals 6004, and Euler's totient φ(5809) equals 5616. The base-10 digit sum is 22.

In number theory, 5809 can be expressed as a sum of two squares: 5809 = 60^2 + 47^2. It also equals 0x16B1 in hexadecimal. Because it is a product of two primes congruent to 1 mod 4, it satisfies the theorem that such numbers can be written as a sum of two squares. These properties illustrate common structures among integers with two such prime factors.