87163135517 has 2 divisors, whose sum is σ = 87163135518. Its totient is φ = 87163135516.

The previous prime is 87163135439. The next prime is 87163135523. The reversal of 87163135517 is 71553136178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83722843801 + 3440291716 = 289349^2 + 58654^2 .

It is a cyclic number.

It is not a de Polignac number, because 87163135517 - 2⁸ = 87163135261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87163135537) 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, 43581567758 + 43581567759.

It is an arithmetic number, because the mean of its divisors is an integer number (43581567759).

Almost surely, 2^87163135517 is an apocalyptic number.

It is an amenable number.

87163135517 is a deficient number, since it is larger than the sum of its proper divisors (1).

87163135517 is an equidigital number, since it uses as much as digits as its factorization.

87163135517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 47.

The spelling of 87163135517 in words is "eighty-seven billion, one hundred sixty-three million, one hundred thirty-five thousand, five hundred seventeen".