871949113709 has 2 divisors, whose sum is σ = 871949113710. Its totient is φ = 871949113708.

The previous prime is 871949113703. The next prime is 871949113811. The reversal of 871949113709 is 907311949178.

871949113709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 462121242025 + 409827871684 = 679795^2 + 640178^2 .

It is a cyclic number.

It is not a de Polignac number, because 871949113709 - 2¹² = 871949109613 is a prime.

It is a super-2 number, since 2×871949113709² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (871949113703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435974556854 + 435974556855.

It is an arithmetic number, because the mean of its divisors is an integer number (435974556855).

Almost surely, 2^871949113709 is an apocalyptic number.

It is an amenable number.

871949113709 is a deficient number, since it is larger than the sum of its proper divisors (1).

871949113709 is an equidigital number, since it uses as much as digits as its factorization.

871949113709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3429216, while the sum is 59.

The spelling of 871949113709 in words is "eight hundred seventy-one billion, nine hundred forty-nine million, one hundred thirteen thousand, seven hundred nine".