3657009 has 4 divisors (see below), whose sum is σ = 4876016. Its totient is φ = 2438004.

The previous prime is 3656993. The next prime is 3657013. The reversal of 3657009 is 9007563.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9007563 = 3 ⋅3002521.

It is not a de Polignac number, because 3657009 - 2⁴ = 3656993 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3657029) 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 in 3 ways as a sum of consecutive naturals, for example, 609499 + ... + 609504.

It is an arithmetic number, because the mean of its divisors is an integer number (1219004).

Almost surely, 2^3657009 is an apocalyptic number.

It is an amenable number.

3657009 is a deficient number, since it is larger than the sum of its proper divisors (1219007).

3657009 is a wasteful number, since it uses less digits than its factorization.

3657009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219006.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 3657009 is about 1912.3307768271. The cubic root of 3657009 is about 154.0666631049.

The spelling of 3657009 in words is "three million, six hundred fifty-seven thousand, nine".