3644663 has 4 divisors (see below), whose sum is σ = 3976008. Its totient is φ = 3313320.

The previous prime is 3644659. The next prime is 3644699. The reversal of 3644663 is 3664463.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3644663 - 2² = 3644659 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 (3644653) 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, 165656 + ... + 165677.

It is an arithmetic number, because the mean of its divisors is an integer number (994002).

Almost surely, 2^3644663 is an apocalyptic number.

3644663 is a deficient number, since it is larger than the sum of its proper divisors (331345).

3644663 is a wasteful number, since it uses less digits than its factorization.

3644663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331344.

The product of its digits is 31104, while the sum is 32.

The square root of 3644663 is about 1909.1000497617. The cubic root of 3644663 is about 153.8930921585.

The spelling of 3644663 in words is "three million, six hundred forty-four thousand, six hundred sixty-three".