3635 has 4 divisors (see below), whose sum is σ = 4368. Its totient is φ = 2904.

The previous prime is 3631. The next prime is 3637. The reversal of 3635 is 5363.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5363 = 31 ⋅173.

It is a cyclic number.

It is not a de Polignac number, because 3635 - 2² = 3631 is a prime.

It is a d-powerful number, because it can be written as 3³ + 3⁷ + 6⁴ + 5³ .

It is a Duffinian number.

It is a plaindrome in base 6, base 14 and base 15.

It is a nialpdrome in base 16.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (3631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359 + ... + 368.

It is an arithmetic number, because the mean of its divisors is an integer number (1092).

3635 is a deficient number, since it is larger than the sum of its proper divisors (733).

3635 is an equidigital number, since it uses as much as digits as its factorization.

3635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its digits is 270, while the sum is 17.

The square root of 3635 is about 60.2909611799. The cubic root of 3635 is about 15.3756967538.

Adding to 3635 its reverse (5363), we get a palindrome (8998).

Subtracting 3635 from its reverse (5363), we obtain a cube (1728 = 12³).

The spelling of 3635 in words is "three thousand, six hundred thirty-five".