4509409 has 2 divisors, whose sum is σ = 4509410. Its totient is φ = 4509408.

The previous prime is 4509377. The next prime is 4509419. The reversal of 4509409 is 9049054.

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., 4293184 + 216225 = 2072^2 + 465^2 .

It is a cyclic number.

It is not a de Polignac number, because 4509409 - 2⁵ = 4509377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4509419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2254704 + 2254705.

It is an arithmetic number, because the mean of its divisors is an integer number (2254705).

Almost surely, 2^4509409 is an apocalyptic number.

It is an amenable number.

4509409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4509409 is an equidigital number, since it uses as much as digits as its factorization.

4509409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 4509409 is about 2123.5369080852. The cubic root of 4509409 is about 165.2113483909.

The spelling of 4509409 in words is "four million, five hundred nine thousand, four hundred nine".