3644623 has 4 divisors (see below), whose sum is σ = 3649360. Its totient is φ = 3639888.

The previous prime is 3644621. The next prime is 3644629. The reversal of 3644623 is 3264463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3264463 = 107 ⋅30509.

It is a cyclic number.

It is not a de Polignac number, because 3644623 - 2¹ = 3644621 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 3644591 and 3644600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644621) 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, 918 + ... + 2851.

It is an arithmetic number, because the mean of its divisors is an integer number (912340).

Almost surely, 2^3644623 is an apocalyptic number.

3644623 is a deficient number, since it is larger than the sum of its proper divisors (4737).

3644623 is an equidigital number, since it uses as much as digits as its factorization.

3644623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4736.

The product of its digits is 10368, while the sum is 28.

The square root of 3644623 is about 1909.0895735926. The cubic root of 3644623 is about 153.8925291667.

The spelling of 3644623 in words is "three million, six hundred forty-four thousand, six hundred twenty-three".