87567371317 has 2 divisors, whose sum is σ = 87567371318. Its totient is φ = 87567371316.

The previous prime is 87567371173. The next prime is 87567371321. The reversal of 87567371317 is 71317376578.

Together with previous prime (87567371173) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71741479716 + 15825891601 = 267846^2 + 125801^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87567371317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87567371387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43783685658 + 43783685659.

It is an arithmetic number, because the mean of its divisors is an integer number (43783685659).

Almost surely, 2^87567371317 is an apocalyptic number.

It is an amenable number.

87567371317 is a deficient number, since it is larger than the sum of its proper divisors (1).

87567371317 is an equidigital number, since it uses as much as digits as its factorization.

87567371317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5186160, while the sum is 55.

The spelling of 87567371317 in words is "eighty-seven billion, five hundred sixty-seven million, three hundred seventy-one thousand, three hundred seventeen".