4805809 has 8 divisors (see below), whose sum is σ = 4988192. Its totient is φ = 4626720.

The previous prime is 4805791. The next prime is 4805821. The reversal of 4805809 is 9085084.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4805809 is a prime.

It is a Duffinian number.

4805809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4875809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2374 + ... + 3904.

It is an arithmetic number, because the mean of its divisors is an integer number (623524).

Almost surely, 2^4805809 is an apocalyptic number.

It is an amenable number.

4805809 is a deficient number, since it is larger than the sum of its proper divisors (182383).

4805809 is a wasteful number, since it uses less digits than its factorization.

4805809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 4805809 is about 2192.2155459717. The cubic root of 4805809 is about 168.7545542438.

Subtracting 4805809 from its reverse (9085084), we obtain a triangular number (4279275 = T₂₉₂₅).

The spelling of 4805809 in words is "four million, eight hundred five thousand, eight hundred nine".