871732917509 has 2 divisors, whose sum is σ = 871732917510. Its totient is φ = 871732917508.

The previous prime is 871732917481. The next prime is 871732917571. The reversal of 871732917509 is 905719237178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 860571628900 + 11161288609 = 927670^2 + 105647^2 .

It is a cyclic number.

It is not a de Polignac number, because 871732917509 - 2¹⁶ = 871732851973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (871732910509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435866458754 + 435866458755.

It is an arithmetic number, because the mean of its divisors is an integer number (435866458755).

Almost surely, 2^871732917509 is an apocalyptic number.

It is an amenable number.

871732917509 is a deficient number, since it is larger than the sum of its proper divisors (1).

871732917509 is an equidigital number, since it uses as much as digits as its factorization.

871732917509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6667920, while the sum is 59.

The spelling of 871732917509 in words is "eight hundred seventy-one billion, seven hundred thirty-two million, nine hundred seventeen thousand, five hundred nine".