6943881317 has 2 divisors, whose sum is σ = 6943881318. Its totient is φ = 6943881316.

The previous prime is 6943881311. The next prime is 6943881349. The reversal of 6943881317 is 7131883496.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4751207041 + 2192674276 = 68929^2 + 46826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6943881317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6943881311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3471940658 + 3471940659.

It is an arithmetic number, because the mean of its divisors is an integer number (3471940659).

Almost surely, 2^6943881317 is an apocalyptic number.

It is an amenable number.

6943881317 is a deficient number, since it is larger than the sum of its proper divisors (1).

6943881317 is an equidigital number, since it uses as much as digits as its factorization.

6943881317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 50.

The square root of 6943881317 is about 83329.9545001676. The cubic root of 6943881317 is about 1907.8054999277.

The spelling of 6943881317 in words is "six billion, nine hundred forty-three million, eight hundred eighty-one thousand, three hundred seventeen".