8820809 has 4 divisors (see below), whose sum is σ = 8941716. Its totient is φ = 8699904.

The previous prime is 8820803. The next prime is 8820811. The reversal of 8820809 is 9080288.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5508409 + 3312400 = 2347^2 + 1820^2 .

It is a cyclic number.

It is not a de Polignac number, because 8820809 - 2⁴ = 8820793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8820803) 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, 60344 + ... + 60489.

It is an arithmetic number, because the mean of its divisors is an integer number (2235429).

Almost surely, 2^8820809 is an apocalyptic number.

It is an amenable number.

8820809 is a deficient number, since it is larger than the sum of its proper divisors (120907).

8820809 is a wasteful number, since it uses less digits than its factorization.

8820809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120906.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 8820809 is about 2969.9846800952. The cubic root of 8820809 is about 206.6186276944.

The spelling of 8820809 in words is "eight million, eight hundred twenty thousand, eight hundred nine".