4409809 has 2 divisors, whose sum is σ = 4409810. Its totient is φ = 4409808.

The previous prime is 4409807. The next prime is 4409849. The reversal of 4409809 is 9089044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4112784 + 297025 = 2028^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 4409809 - 2¹ = 4409807 is a prime.

Together with 4409807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4409803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2204904 + 2204905.

It is an arithmetic number, because the mean of its divisors is an integer number (2204905).

Almost surely, 2^4409809 is an apocalyptic number.

It is an amenable number.

4409809 is a deficient number, since it is larger than the sum of its proper divisors (1).

4409809 is an equidigital number, since it uses as much as digits as its factorization.

4409809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 4409809 is about 2099.9545233171. The cubic root of 4409809 is about 163.9859322655.

The spelling of 4409809 in words is "four million, four hundred nine thousand, eight hundred nine".