8809 has 4 divisors (see below), whose sum is σ = 9216. Its totient is φ = 8404.

The previous prime is 8807. The next prime is 8819. The reversal of 8809 is 9088.

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 8809 - 2¹ = 8807 is a prime.

It is a Duffinian number.

8809 is a lucky number.

It is a plaindrome in base 11 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8803) 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, 169 + ... + 214.

It is an arithmetic number, because the mean of its divisors is an integer number (2304).

2⁸⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

8809 is a deficient number, since it is larger than the sum of its proper divisors (407).

8809 is a wasteful number, since it uses less digits than its factorization.

8809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 8809 is about 93.8562730988. The cubic root of 8809 is about 20.6526381846.

The spelling of 8809 in words is "eight thousand, eight hundred nine".