3656843 has 2 divisors, whose sum is σ = 3656844. Its totient is φ = 3656842.

The previous prime is 3656837. The next prime is 3656857. The reversal of 3656843 is 3486563.

It is a weak prime.

It is an emirp because it is prime and its reverse (3486563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3656843 - 2⁴ = 3656827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3656833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1828421 + 1828422.

It is an arithmetic number, because the mean of its divisors is an integer number (1828422).

Almost surely, 2^3656843 is an apocalyptic number.

3656843 is a deficient number, since it is larger than the sum of its proper divisors (1).

3656843 is an equidigital number, since it uses as much as digits as its factorization.

3656843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 35.

The square root of 3656843 is about 1912.2873738013. The cubic root of 3656843 is about 154.0643319236.

The spelling of 3656843 in words is "three million, six hundred fifty-six thousand, eight hundred forty-three".