3643533 has 6 divisors (see below), whose sum is σ = 5262894. Its totient is φ = 2429016.

The previous prime is 3643529. The next prime is 3643537. The reversal of 3643533 is 3353463.

It is an interprime number because it is at equal distance from previous prime (3643529) and next prime (3643537).

It can be written as a sum of positive squares in only one way, i.e., 2196324 + 1447209 = 1482^2 + 1203^2 .

It is not a de Polignac number, because 3643533 - 2² = 3643529 is a prime.

It is a super-3 number, since 3×3643533³ (a number of 21 digits) contains 333 as substring.

It is a d-powerful number, because it can be written as 3³ + 6⁸ + 4⁶ + 3³ + 5⁹ + 3⁴ + 3⁸ .

It is a junction number, because it is equal to n+sod(n) for n = 3643497 and 3643506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643537) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 202410 + ... + 202427.

It is an arithmetic number, because the mean of its divisors is an integer number (877149).

Almost surely, 2^3643533 is an apocalyptic number.

It is an amenable number.

3643533 is a deficient number, since it is larger than the sum of its proper divisors (1619361).

3643533 is a wasteful number, since it uses less digits than its factorization.

3643533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404843 (or 404840 counting only the distinct ones).

The product of its digits is 9720, while the sum is 27.

The square root of 3643533 is about 1908.8040758548. The cubic root of 3643533 is about 153.8771860542.

Adding to 3643533 its reverse (3353463), we get a palindrome (6996996).

The spelling of 3643533 in words is "three million, six hundred forty-three thousand, five hundred thirty-three".