3639613 has 4 divisors (see below), whose sum is σ = 3644128. Its totient is φ = 3635100.

The previous prime is 3639593. The next prime is 3639631. The reversal of 3639613 is 3169363.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3169363 = 1523 ⋅2081.

It is a cyclic number.

It is not a de Polignac number, because 3639613 - 2¹⁷ = 3508541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639913) 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, 681 + ... + 2782.

It is an arithmetic number, because the mean of its divisors is an integer number (911032).

Almost surely, 2^3639613 is an apocalyptic number.

It is an amenable number.

3639613 is a deficient number, since it is larger than the sum of its proper divisors (4515).

3639613 is a wasteful number, since it uses less digits than its factorization.

3639613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4514.

The product of its digits is 8748, while the sum is 31.

The square root of 3639613 is about 1907.7769785800. The cubic root of 3639613 is about 153.8219818498.

The spelling of 3639613 in words is "three million, six hundred thirty-nine thousand, six hundred thirteen".