6978343717 has 2 divisors, whose sum is σ = 6978343718. Its totient is φ = 6978343716.

The previous prime is 6978343679. The next prime is 6978343751. The reversal of 6978343717 is 7173438796.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6775594596 + 202749121 = 82314^2 + 14239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6978343717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6978343117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3489171858 + 3489171859.

It is an arithmetic number, because the mean of its divisors is an integer number (3489171859).

Almost surely, 2^6978343717 is an apocalyptic number.

It is an amenable number.

6978343717 is a deficient number, since it is larger than the sum of its proper divisors (1).

6978343717 is an equidigital number, since it uses as much as digits as its factorization.

6978343717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5334336, while the sum is 55.

The square root of 6978343717 is about 83536.4813539570. The cubic root of 6978343717 is about 1910.9564316166.

The spelling of 6978343717 in words is "six billion, nine hundred seventy-eight million, three hundred forty-three thousand, seven hundred seventeen".