3920843 has 2 divisors, whose sum is σ = 3920844. Its totient is φ = 3920842.

The previous prime is 3920797. The next prime is 3920857. The reversal of 3920843 is 3480293.

It is a strong prime.

It is an emirp because it is prime and its reverse (3480293) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3920843 is a prime.

It is not a weakly prime, because it can be changed into another prime (3920243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1960421 + 1960422.

It is an arithmetic number, because the mean of its divisors is an integer number (1960422).

Almost surely, 2^3920843 is an apocalyptic number.

3920843 is a deficient number, since it is larger than the sum of its proper divisors (1).

3920843 is an equidigital number, since it uses as much as digits as its factorization.

3920843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 3920843 is about 1980.1118655268. Note that the first 3 decimals coincide. The cubic root of 3920843 is about 157.6860051539.

The spelling of 3920843 in words is "three million, nine hundred twenty thousand, eight hundred forty-three".