8688617081 has 2 divisors, whose sum is σ = 8688617082. Its totient is φ = 8688617080.

The previous prime is 8688616999. The next prime is 8688617083. The reversal of 8688617081 is 1807168868.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8683257856 + 5359225 = 93184^2 + 2315^2 .

It is a cyclic number.

It is not a de Polignac number, because 8688617081 - 2¹⁸ = 8688354937 is a prime.

It is a super-2 number, since 2×8688617081² (a number of 21 digits) contains 22 as substring.

Together with 8688617083, 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 (8688617083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4344308540 + 4344308541.

It is an arithmetic number, because the mean of its divisors is an integer number (4344308541).

Almost surely, 2^8688617081 is an apocalyptic number.

It is an amenable number.

8688617081 is a deficient number, since it is larger than the sum of its proper divisors (1).

8688617081 is an equidigital number, since it uses as much as digits as its factorization.

8688617081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1032192, while the sum is 53.

The square root of 8688617081 is about 93212.7517081220. The cubic root of 8688617081 is about 2055.8127375692.

The spelling of 8688617081 in words is "eight billion, six hundred eighty-eight million, six hundred seventeen thousand, eighty-one".