87563113889 has 2 divisors, whose sum is σ = 87563113890. Its totient is φ = 87563113888.

The previous prime is 87563113867. The next prime is 87563113933. The reversal of 87563113889 is 98831136578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46472580625 + 41090533264 = 215575^2 + 202708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87563113889 is a prime.

It is not a weakly prime, because it can be changed into another prime (87563113829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43781556944 + 43781556945.

It is an arithmetic number, because the mean of its divisors is an integer number (43781556945).

Almost surely, 2^87563113889 is an apocalyptic number.

It is an amenable number.

87563113889 is a deficient number, since it is larger than the sum of its proper divisors (1).

87563113889 is an equidigital number, since it uses as much as digits as its factorization.

87563113889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 59.

The spelling of 87563113889 in words is "eighty-seven billion, five hundred sixty-three million, one hundred thirteen thousand, eight hundred eighty-nine".