71317567889 has 2 divisors, whose sum is σ = 71317567890. Its totient is φ = 71317567888.

The previous prime is 71317567873. The next prime is 71317567943. The reversal of 71317567889 is 98876571317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46555398289 + 24762169600 = 215767^2 + 157360^2 .

It is a cyclic number.

It is not a de Polignac number, because 71317567889 - 2⁴ = 71317567873 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (71317567859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35658783944 + 35658783945.

It is an arithmetic number, because the mean of its divisors is an integer number (35658783945).

Almost surely, 2^71317567889 is an apocalyptic number.

It is an amenable number.

71317567889 is a deficient number, since it is larger than the sum of its proper divisors (1).

71317567889 is an equidigital number, since it uses as much as digits as its factorization.

71317567889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17781120, while the sum is 62.

The spelling of 71317567889 in words is "seventy-one billion, three hundred seventeen million, five hundred sixty-seven thousand, eight hundred eighty-nine".