3813643 has 2 divisors, whose sum is σ = 3813644. Its totient is φ = 3813642.

The previous prime is 3813631. The next prime is 3813647. The reversal of 3813643 is 3463183.

It is a strong prime.

It is an emirp because it is prime and its reverse (3463183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3813643 - 2⁵ = 3813611 is a prime.

It is not a weakly prime, because it can be changed into another prime (3813647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1906821 + 1906822.

It is an arithmetic number, because the mean of its divisors is an integer number (1906822).

Almost surely, 2^3813643 is an apocalyptic number.

3813643 is a deficient number, since it is larger than the sum of its proper divisors (1).

3813643 is an equidigital number, since it uses as much as digits as its factorization.

3813643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 3813643 is about 1952.8550893499. The cubic root of 3813643 is about 156.2356044338.

The spelling of 3813643 in words is "three million, eight hundred thirteen thousand, six hundred forty-three".