3659621 has 8 divisors (see below), whose sum is σ = 4195584. Its totient is φ = 3126960.

The previous prime is 3659611. The next prime is 3659627. The reversal of 3659621 is 1269563.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3659621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3659627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2411 + ... + 3623.

It is an arithmetic number, because the mean of its divisors is an integer number (524448).

Almost surely, 2^3659621 is an apocalyptic number.

It is an amenable number.

3659621 is a deficient number, since it is larger than the sum of its proper divisors (535963).

3659621 is a wasteful number, since it uses less digits than its factorization.

3659621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651.

The product of its digits is 9720, while the sum is 32.

The square root of 3659621 is about 1913.0135911697. The cubic root of 3659621 is about 154.1033348179.

The spelling of 3659621 in words is "three million, six hundred fifty-nine thousand, six hundred twenty-one".