8361273617 has 2 divisors, whose sum is σ = 8361273618. Its totient is φ = 8361273616.

The previous prime is 8361273581. The next prime is 8361273619. The reversal of 8361273617 is 7163721638.

8361273617 is digitally balanced in base 3, 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., 8235744001 + 125529616 = 90751^2 + 11204^2 .

It is a cyclic number.

It is not a de Polignac number, because 8361273617 - 2¹⁸ = 8361011473 is a prime.

Together with 8361273619, 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 (8361273619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4180636808 + 4180636809.

It is an arithmetic number, because the mean of its divisors is an integer number (4180636809).

Almost surely, 2^8361273617 is an apocalyptic number.

It is an amenable number.

8361273617 is a deficient number, since it is larger than the sum of its proper divisors (1).

8361273617 is an equidigital number, since it uses as much as digits as its factorization.

8361273617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The square root of 8361273617 is about 91440.0000929571. Note that the first 4 decimals coincide. The cubic root of 8361273617 is about 2029.6639835500.

The spelling of 8361273617 in words is "eight billion, three hundred sixty-one million, two hundred seventy-three thousand, six hundred seventeen".