3924643 has 4 divisors (see below), whose sum is σ = 4020408. Its totient is φ = 3828880.

The previous prime is 3924617. The next prime is 3924649. The reversal of 3924643 is 3464293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3464293 = 7 ⋅494899.

It is a cyclic number.

It is not a de Polignac number, because 3924643 - 2⁵ = 3924611 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3924649) 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, 47821 + ... + 47902.

It is an arithmetic number, because the mean of its divisors is an integer number (1005102).

Almost surely, 2^3924643 is an apocalyptic number.

3924643 is a deficient number, since it is larger than the sum of its proper divisors (95765).

3924643 is an equidigital number, since it uses as much as digits as its factorization.

3924643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95764.

The product of its digits is 15552, while the sum is 31.

The square root of 3924643 is about 1981.0711748950. The cubic root of 3924643 is about 157.7369307112.

The spelling of 3924643 in words is "three million, nine hundred twenty-four thousand, six hundred forty-three".