6939143 has 2 divisors, whose sum is σ = 6939144. Its totient is φ = 6939142.

The previous prime is 6939139. The next prime is 6939151. The reversal of 6939143 is 3419396.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6939143 - 2² = 6939139 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6939103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3469571 + 3469572.

It is an arithmetic number, because the mean of its divisors is an integer number (3469572).

Almost surely, 2^6939143 is an apocalyptic number.

6939143 is a deficient number, since it is larger than the sum of its proper divisors (1).

6939143 is an equidigital number, since it uses as much as digits as its factorization.

6939143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 35.

The square root of 6939143 is about 2634.2253130664. The cubic root of 6939143 is about 190.7371456210.

The spelling of 6939143 in words is "six million, nine hundred thirty-nine thousand, one hundred forty-three".