87618942857 has 2 divisors, whose sum is σ = 87618942858. Its totient is φ = 87618942856.

The previous prime is 87618942847. The next prime is 87618942863. The reversal of 87618942857 is 75824981678.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83134765561 + 4484177296 = 288331^2 + 66964^2 .

It is a cyclic number.

It is not a de Polignac number, because 87618942857 - 2³⁶ = 18899466121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87618942793 and 87618942802.

It is not a weakly prime, because it can be changed into another prime (87618942847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43809471428 + 43809471429.

It is an arithmetic number, because the mean of its divisors is an integer number (43809471429).

Almost surely, 2^87618942857 is an apocalyptic number.

It is an amenable number.

87618942857 is a deficient number, since it is larger than the sum of its proper divisors (1).

87618942857 is an equidigital number, since it uses as much as digits as its factorization.

87618942857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54190080, while the sum is 65.

The spelling of 87618942857 in words is "eighty-seven billion, six hundred eighteen million, nine hundred forty-two thousand, eight hundred fifty-seven".