4423609 has 4 divisors (see below), whose sum is σ = 4543204. Its totient is φ = 4304016.

The previous prime is 4423603. The next prime is 4423619. The reversal of 4423609 is 9063244.

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 2805625 + 1617984 = 1675^2 + 1272^2 .

It is a cyclic number.

It is not a de Polignac number, because 4423609 - 2⁷ = 4423481 is a prime.

It is a Duffinian number.

4423609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4423603) 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, 59742 + ... + 59815.

It is an arithmetic number, because the mean of its divisors is an integer number (1135801).

Almost surely, 2^4423609 is an apocalyptic number.

It is an amenable number.

4423609 is a deficient number, since it is larger than the sum of its proper divisors (119595).

4423609 is a wasteful number, since it uses less digits than its factorization.

4423609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119594.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 4423609 is about 2103.2377421490. The cubic root of 4423609 is about 164.1568126334.

It can be divided in two parts, 44 and 23609, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 4423609 in words is "four million, four hundred twenty-three thousand, six hundred nine".