3621663 has 12 divisors (see below), whose sum is σ = 5539248. Its totient is φ = 2272320.

The previous prime is 3621661. The next prime is 3621691. The reversal of 3621663 is 3661263.

It is not a de Polignac number, because 3621663 - 2¹ = 3621661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621661) 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 11 ways as a sum of consecutive naturals, for example, 11683 + ... + 11988.

It is an arithmetic number, because the mean of its divisors is an integer number (461604).

Almost surely, 2^3621663 is an apocalyptic number.

3621663 is a deficient number, since it is larger than the sum of its proper divisors (1917585).

3621663 is a wasteful number, since it uses less digits than its factorization.

3621663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23694 (or 23691 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 3621663 is about 1903.0667355613. The cubic root of 3621663 is about 153.5686897037.

It can be divided in two parts, 362 and 1663, that added together give a square (2025 = 45²).

The spelling of 3621663 in words is "three million, six hundred twenty-one thousand, six hundred sixty-three".