8707885981 has 2 divisors, whose sum is σ = 8707885982. Its totient is φ = 8707885980.

The previous prime is 8707885939. The next prime is 8707886003. The reversal of 8707885981 is 1895887078.

8707885981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5763087225 + 2944798756 = 75915^2 + 54266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8707885981 is a prime.

It is a super-2 number, since 2×8707885981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8707885931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4353942990 + 4353942991.

It is an arithmetic number, because the mean of its divisors is an integer number (4353942991).

Almost surely, 2^8707885981 is an apocalyptic number.

It is an amenable number.

8707885981 is a deficient number, since it is larger than the sum of its proper divisors (1).

8707885981 is an equidigital number, since it uses as much as digits as its factorization.

8707885981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9031680, while the sum is 61.

The square root of 8707885981 is about 93316.0542511309. The cubic root of 8707885981 is about 2057.3313529425.

The spelling of 8707885981 in words is "eight billion, seven hundred seven million, eight hundred eighty-five thousand, nine hundred eighty-one".