8688170549 has 2 divisors, whose sum is σ = 8688170550. Its totient is φ = 8688170548.

The previous prime is 8688170539. The next prime is 8688170551. The reversal of 8688170549 is 9450718868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6785640625 + 1902529924 = 82375^2 + 43618^2 .

It is a cyclic number.

It is not a de Polignac number, because 8688170549 - 2¹² = 8688166453 is a prime.

It is a super-2 number, since 2×8688170549² (a number of 21 digits) contains 22 as substring.

Together with 8688170551, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8688170494 and 8688170503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8688170539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4344085274 + 4344085275.

It is an arithmetic number, because the mean of its divisors is an integer number (4344085275).

Almost surely, 2^8688170549 is an apocalyptic number.

It is an amenable number.

8688170549 is a deficient number, since it is larger than the sum of its proper divisors (1).

8688170549 is an equidigital number, since it uses as much as digits as its factorization.

8688170549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3870720, while the sum is 56.

The square root of 8688170549 is about 93210.3564471245. The cubic root of 8688170549 is about 2055.7775190033. Note that the first 3 decimals are identical.

The spelling of 8688170549 in words is "eight billion, six hundred eighty-eight million, one hundred seventy thousand, five hundred forty-nine".