3684391 has 2 divisors, whose sum is σ = 3684392. Its totient is φ = 3684390.

The previous prime is 3684389. The next prime is 3684407. The reversal of 3684391 is 1934863.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3684391 - 2¹ = 3684389 is a prime.

Together with 3684389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3684311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1842195 + 1842196.

It is an arithmetic number, because the mean of its divisors is an integer number (1842196).

Almost surely, 2^3684391 is an apocalyptic number.

3684391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3684391 is an equidigital number, since it uses as much as digits as its factorization.

3684391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 3684391 is about 1919.4767516175. The cubic root of 3684391 is about 154.4502341087.

The spelling of 3684391 in words is "three million, six hundred eighty-four thousand, three hundred ninety-one".