3639533 has 4 divisors (see below), whose sum is σ = 3701280. Its totient is φ = 3577788.

The previous prime is 3639527. The next prime is 3639541. The reversal of 3639533 is 3359363.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3359363 = 7 ⋅479909.

It is a cyclic number.

It is not a de Polignac number, because 3639533 - 2⁸ = 3639277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3639533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639523) 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 3 ways as a sum of consecutive naturals, for example, 30785 + ... + 30902.

It is an arithmetic number, because the mean of its divisors is an integer number (925320).

Almost surely, 2^3639533 is an apocalyptic number.

It is an amenable number.

3639533 is a deficient number, since it is larger than the sum of its proper divisors (61747).

3639533 is an equidigital number, since it uses as much as digits as its factorization.

3639533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61746.

The product of its digits is 21870, while the sum is 32.

The square root of 3639533 is about 1907.7560116535. The cubic root of 3639533 is about 153.8208548207.

The spelling of 3639533 in words is "three million, six hundred thirty-nine thousand, five hundred thirty-three".