3643309 has 4 divisors (see below), whose sum is σ = 3705120. Its totient is φ = 3581500.

The previous prime is 3643303. The next prime is 3643331. The reversal of 3643309 is 9033463.

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: 9033463 = 821 ⋅11003.

It is a cyclic number.

It is not a de Polignac number, because 3643309 - 2⁷ = 3643181 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30817 + ... + 30934.

It is an arithmetic number, because the mean of its divisors is an integer number (926280).

Almost surely, 2^3643309 is an apocalyptic number.

It is an amenable number.

3643309 is a deficient number, since it is larger than the sum of its proper divisors (61811).

3643309 is an equidigital number, since it uses as much as digits as its factorization.

3643309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61810.

The product of its (nonzero) digits is 5832, while the sum is 28.

The square root of 3643309 is about 1908.7453994706. The cubic root of 3643309 is about 153.8740325952.

The spelling of 3643309 in words is "three million, six hundred forty-three thousand, three hundred nine".