3643009 has 4 divisors (see below), whose sum is σ = 3768660. Its totient is φ = 3517360.

The previous prime is 3643001. The next prime is 3643033. The reversal of 3643009 is 9003463.

3643009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9003463 = 7 ⋅1286209.

It can be written as a sum of positive squares in 2 ways, for example, as 1476225 + 2166784 = 1215^2 + 1472^2 .

It is a cyclic number.

It is not a de Polignac number, because 3643009 - 2³ = 3643001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3643001) 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 in 3 ways as a sum of consecutive naturals, for example, 62782 + ... + 62839.

It is an arithmetic number, because the mean of its divisors is an integer number (942165).

Almost surely, 2^3643009 is an apocalyptic number.

It is an amenable number.

3643009 is a deficient number, since it is larger than the sum of its proper divisors (125651).

3643009 is a wasteful number, since it uses less digits than its factorization.

3643009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125650.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 3643009 is about 1908.6668122016. Note that the first 3 decimals coincide. The cubic root of 3643009 is about 153.8698090101.

The spelling of 3643009 in words is "three million, six hundred forty-three thousand, nine".