3684643 has 2 divisors, whose sum is σ = 3684644. Its totient is φ = 3684642.

The previous prime is 3684641. The next prime is 3684647. The reversal of 3684643 is 3464863.

It is a weak prime.

It is an emirp because it is prime and its reverse (3464863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3684643 - 2¹ = 3684641 is a prime.

Together with 3684641, it forms a pair of twin primes.

3684643 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3684599 and 3684608.

It is not a weakly prime, because it can be changed into another prime (3684641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1842321 + 1842322.

It is an arithmetic number, because the mean of its divisors is an integer number (1842322).

Almost surely, 2^3684643 is an apocalyptic number.

3684643 is a deficient number, since it is larger than the sum of its proper divisors (1).

3684643 is an equidigital number, since it uses as much as digits as its factorization.

3684643 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 3684643 is about 1919.5423933844. The cubic root of 3684643 is about 154.4537553213.

The spelling of 3684643 in words is "three million, six hundred eighty-four thousand, six hundred forty-three".