4049609 has 2 divisors, whose sum is σ = 4049610. Its totient is φ = 4049608.

The previous prime is 4049593. The next prime is 4049707. The reversal of 4049609 is 9069404.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4020025 + 29584 = 2005^2 + 172^2 .

It is a cyclic number.

It is not a de Polignac number, because 4049609 - 2⁴ = 4049593 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4042609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2024804 + 2024805.

It is an arithmetic number, because the mean of its divisors is an integer number (2024805).

Almost surely, 2^4049609 is an apocalyptic number.

It is an amenable number.

4049609 is a deficient number, since it is larger than the sum of its proper divisors (1).

4049609 is an equidigital number, since it uses as much as digits as its factorization.

4049609 is an odious number, because the sum of its binary digits is odd.

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

The square root of 4049609 is about 2012.3640326740. The cubic root of 4049609 is about 159.3936555888.

The spelling of 4049609 in words is "four million, forty-nine thousand, six hundred nine".