4223809 has 4 divisors (see below), whose sum is σ = 4338004. Its totient is φ = 4109616.

The previous prime is 4223801. The next prime is 4223831. The reversal of 4223809 is 9083224.

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 3814209 + 409600 = 1953^2 + 640^2 .

It is a cyclic number.

It is not a de Polignac number, because 4223809 - 2³ = 4223801 is a prime.

It is a Duffinian number.

4223809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4223801) 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, 57042 + ... + 57115.

It is an arithmetic number, because the mean of its divisors is an integer number (1084501).

Almost surely, 2^4223809 is an apocalyptic number.

It is an amenable number.

4223809 is a deficient number, since it is larger than the sum of its proper divisors (114195).

4223809 is a wasteful number, since it uses less digits than its factorization.

4223809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114194.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 4223809 is about 2055.1907454054. The cubic root of 4223809 is about 161.6471643082.

The spelling of 4223809 in words is "four million, two hundred twenty-three thousand, eight hundred nine".