3984643 has 4 divisors (see below), whose sum is σ = 4291168. Its totient is φ = 3678120.

The previous prime is 3984611. The next prime is 3984649. The reversal of 3984643 is 3464893.

3984643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3464893 = 59 ⋅58727.

It is a cyclic number.

It is not a de Polignac number, because 3984643 - 2⁵ = 3984611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3984649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153243 + ... + 153268.

It is an arithmetic number, because the mean of its divisors is an integer number (1072792).

Almost surely, 2^3984643 is an apocalyptic number.

3984643 is a deficient number, since it is larger than the sum of its proper divisors (306525).

3984643 is a wasteful number, since it uses less digits than its factorization.

3984643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306524.

The product of its digits is 62208, while the sum is 37.

The square root of 3984643 is about 1996.1570579491. The cubic root of 3984643 is about 158.5366970131.

It can be divided in two parts, 398 and 4643, that added together give a square (5041 = 71²).

The spelling of 3984643 in words is "three million, nine hundred eighty-four thousand, six hundred forty-three".