68172617 has 2 divisors, whose sum is σ = 68172618. Its totient is φ = 68172616.

The previous prime is 68172581. The next prime is 68172647. The reversal of 68172617 is 71627186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58537801 + 9634816 = 7651^2 + 3104^2 .

It is a cyclic number.

It is not a de Polignac number, because 68172617 - 2²⁴ = 51395401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68172647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34086308 + 34086309.

It is an arithmetic number, because the mean of its divisors is an integer number (34086309).

Almost surely, 2^68172617 is an apocalyptic number.

It is an amenable number.

68172617 is a deficient number, since it is larger than the sum of its proper divisors (1).

68172617 is an equidigital number, since it uses as much as digits as its factorization.

68172617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 38.

The square root of 68172617 is about 8256.6710604214. The cubic root of 68172617 is about 408.5105924093.

The spelling of 68172617 in words is "sixty-eight million, one hundred seventy-two thousand, six hundred seventeen".