8100868889 has 2 divisors, whose sum is σ = 8100868890. Its totient is φ = 8100868888.

The previous prime is 8100868813. The next prime is 8100868891. The reversal of 8100868889 is 9888680018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6678975625 + 1421893264 = 81725^2 + 37708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8100868889 is a prime.

Together with 8100868891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8100868289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4050434444 + 4050434445.

It is an arithmetic number, because the mean of its divisors is an integer number (4050434445).

Almost surely, 2^8100868889 is an apocalyptic number.

It is an amenable number.

8100868889 is a deficient number, since it is larger than the sum of its proper divisors (1).

8100868889 is an equidigital number, since it uses as much as digits as its factorization.

8100868889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1769472, while the sum is 56.

The square root of 8100868889 is about 90004.8270316654. The cubic root of 8100868889 is about 2008.3706579168.

The spelling of 8100868889 in words is "eight billion, one hundred million, eight hundred sixty-eight thousand, eight hundred eighty-nine".