6871939709 has 2 divisors, whose sum is σ = 6871939710. Its totient is φ = 6871939708.

The previous prime is 6871939639. The next prime is 6871939751. The reversal of 6871939709 is 9079391786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6589867684 + 282072025 = 81178^2 + 16795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6871939709 is a prime.

It is a super-3 number, since 3×6871939709³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6871939309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3435969854 + 3435969855.

It is an arithmetic number, because the mean of its divisors is an integer number (3435969855).

Almost surely, 2^6871939709 is an apocalyptic number.

It is an amenable number.

6871939709 is a deficient number, since it is larger than the sum of its proper divisors (1).

6871939709 is an equidigital number, since it uses as much as digits as its factorization.

6871939709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5143824, while the sum is 59.

The square root of 6871939709 is about 82897.1634556937. The cubic root of 6871939709 is about 1901.1940517514.

The spelling of 6871939709 in words is "six billion, eight hundred seventy-one million, nine hundred thirty-nine thousand, seven hundred nine".