871516171 has 2 divisors, whose sum is σ = 871516172. Its totient is φ = 871516170.

The previous prime is 871516133. The next prime is 871516181. The reversal of 871516171 is 171615178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 871516171 - 2²³ = 863127563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 871516171.

It is not a weakly prime, because it can be changed into another prime (871516181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435758085 + 435758086.

It is an arithmetic number, because the mean of its divisors is an integer number (435758086).

Almost surely, 2^871516171 is an apocalyptic number.

871516171 is a deficient number, since it is larger than the sum of its proper divisors (1).

871516171 is an equidigital number, since it uses as much as digits as its factorization.

871516171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 37.

The square root of 871516171 is about 29521.4527250947. The cubic root of 871516171 is about 955.1945076799.

The spelling of 871516171 in words is "eight hundred seventy-one million, five hundred sixteen thousand, one hundred seventy-one".