3643549 has 8 divisors (see below), whose sum is σ = 4484480. Its totient is φ = 2882736.

The previous prime is 3643537. The next prime is 3643561. The reversal of 3643549 is 9453463.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3643537) and next prime (3643561).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3643549 - 2⁵ = 3643517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643529) 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 7 ways as a sum of consecutive naturals, for example, 19929 + ... + 20110.

It is an arithmetic number, because the mean of its divisors is an integer number (560560).

Almost surely, 2^3643549 is an apocalyptic number.

It is an amenable number.

3643549 is a deficient number, since it is larger than the sum of its proper divisors (840931).

3643549 is a wasteful number, since it uses less digits than its factorization.

3643549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40059.

The product of its digits is 38880, while the sum is 34.

The square root of 3643549 is about 1908.8082669561. The cubic root of 3643549 is about 153.8774112963.

The spelling of 3643549 in words is "three million, six hundred forty-three thousand, five hundred forty-nine".