3864643 has 2 divisors, whose sum is σ = 3864644. Its totient is φ = 3864642.

The previous prime is 3864629. The next prime is 3864671. The reversal of 3864643 is 3464683.

It is a weak prime.

It is an emirp because it is prime and its reverse (3464683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3864643 - 2⁹ = 3864131 is a prime.

3864643 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3864599 and 3864608.

It is not a weakly prime, because it can be changed into another prime (3864673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1932321 + 1932322.

It is an arithmetic number, because the mean of its divisors is an integer number (1932322).

Almost surely, 2^3864643 is an apocalyptic number.

3864643 is a deficient number, since it is larger than the sum of its proper divisors (1).

3864643 is an equidigital number, since it uses as much as digits as its factorization.

3864643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 34.

The square root of 3864643 is about 1965.8695277154. The cubic root of 3864643 is about 156.9289710754.

The spelling of 3864643 in words is "three million, eight hundred sixty-four thousand, six hundred forty-three".