3684641 has 2 divisors, whose sum is σ = 3684642. Its totient is φ = 3684640.

The previous prime is 3684607. The next prime is 3684643. The reversal of 3684641 is 1464863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2235025 + 1449616 = 1495^2 + 1204^2 .

It is an emirp because it is prime and its reverse (1464863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3684641 - 2¹⁴ = 3668257 is a prime.

Together with 3684643, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3684598 and 3684607.

It is not a weakly prime, because it can be changed into another prime (3684643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1842320 + 1842321.

It is an arithmetic number, because the mean of its divisors is an integer number (1842321).

Almost surely, 2^3684641 is an apocalyptic number.

It is an amenable number.

3684641 is a deficient number, since it is larger than the sum of its proper divisors (1).

3684641 is an equidigital number, since it uses as much as digits as its factorization.

3684641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 32.

The square root of 3684641 is about 1919.5418724269. The cubic root of 3684641 is about 154.4537273758.

The spelling of 3684641 in words is "three million, six hundred eighty-four thousand, six hundred forty-one".