871172101 has 2 divisors, whose sum is σ = 871172102. Its totient is φ = 871172100.

The previous prime is 871172063. The next prime is 871172117. The reversal of 871172101 is 101271178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 839260900 + 31911201 = 28970^2 + 5649^2 .

It is a cyclic number.

It is not a de Polignac number, because 871172101 - 2⁹ = 871171589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 871172101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (871172801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435586050 + 435586051.

It is an arithmetic number, because the mean of its divisors is an integer number (435586051).

Almost surely, 2^871172101 is an apocalyptic number.

It is an amenable number.

871172101 is a deficient number, since it is larger than the sum of its proper divisors (1).

871172101 is an equidigital number, since it uses as much as digits as its factorization.

871172101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 28.

The square root of 871172101 is about 29515.6246926945. The cubic root of 871172101 is about 955.0687892118.

The spelling of 871172101 in words is "eight hundred seventy-one million, one hundred seventy-two thousand, one hundred one".