6813943 has 2 divisors, whose sum is σ = 6813944. Its totient is φ = 6813942.

The previous prime is 6813901. The next prime is 6813949. The reversal of 6813943 is 3493186.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6813943 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6813899 and 6813908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6813949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3406971 + 3406972.

It is an arithmetic number, because the mean of its divisors is an integer number (3406972).

Almost surely, 2^6813943 is an apocalyptic number.

6813943 is a deficient number, since it is larger than the sum of its proper divisors (1).

6813943 is an equidigital number, since it uses as much as digits as its factorization.

6813943 is an odious number, because the sum of its binary digits is odd.

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

The square root of 6813943 is about 2610.3530412571. The cubic root of 6813943 is about 189.5830468887.

It can be divided in two parts, 681 and 3943, that added together give a square (4624 = 68²).

The spelling of 6813943 in words is "six million, eight hundred thirteen thousand, nine hundred forty-three".