6981943 has 2 divisors, whose sum is σ = 6981944. Its totient is φ = 6981942.

The previous prime is 6981889. The next prime is 6981959. The reversal of 6981943 is 3491896.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6981943 - 2²¹ = 4884791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6981896 and 6981905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6981973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3490971 + 3490972.

It is an arithmetic number, because the mean of its divisors is an integer number (3490972).

Almost surely, 2^6981943 is an apocalyptic number.

6981943 is a deficient number, since it is larger than the sum of its proper divisors (1).

6981943 is an equidigital number, since it uses as much as digits as its factorization.

6981943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 40.

The square root of 6981943 is about 2642.3366553110. The cubic root of 6981943 is about 191.1284918867.

The spelling of 6981943 in words is "six million, nine hundred eighty-one thousand, nine hundred forty-three".