3649609 has 2 divisors, whose sum is σ = 3649610. Its totient is φ = 3649608.

The previous prime is 3649601. The next prime is 3649637. The reversal of 3649609 is 9069463.

3649609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3341584 + 308025 = 1828^2 + 555^2 .

It is a cyclic number.

It is not a de Polignac number, because 3649609 - 2³ = 3649601 is a prime.

It is not a weakly prime, because it can be changed into another prime (3649601) 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, 1824804 + 1824805.

It is an arithmetic number, because the mean of its divisors is an integer number (1824805).

Almost surely, 2^3649609 is an apocalyptic number.

It is an amenable number.

3649609 is a deficient number, since it is larger than the sum of its proper divisors (1).

3649609 is an equidigital number, since it uses as much as digits as its factorization.

3649609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 3649609 is about 1910.3949853368. The cubic root of 3649609 is about 153.9626743744.

The spelling of 3649609 in words is "three million, six hundred forty-nine thousand, six hundred nine".