4409609 has 2 divisors, whose sum is σ = 4409610. Its totient is φ = 4409608.

The previous prime is 4409569. The next prime is 4409611. The reversal of 4409609 is 9069044.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2393209 + 2016400 = 1547^2 + 1420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4409609 is a prime.

Together with 4409611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4409809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2204804 + 2204805.

It is an arithmetic number, because the mean of its divisors is an integer number (2204805).

Almost surely, 2^4409609 is an apocalyptic number.

It is an amenable number.

4409609 is a deficient number, since it is larger than the sum of its proper divisors (1).

4409609 is an equidigital number, since it uses as much as digits as its factorization.

4409609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 4409609 is about 2099.9069026983. The cubic root of 4409609 is about 163.9834531194.

The spelling of 4409609 in words is "four million, four hundred nine thousand, six hundred nine".