171361217 has 2 divisors, whose sum is σ = 171361218. Its totient is φ = 171361216.

The previous prime is 171361213. The next prime is 171361283. The reversal of 171361217 is 712163171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122235136 + 49126081 = 11056^2 + 7009^2 .

It is a cyclic number.

It is not a de Polignac number, because 171361217 - 2² = 171361213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 171361217.

It is not a weakly prime, because it can be changed into another prime (171361213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85680608 + 85680609.

It is an arithmetic number, because the mean of its divisors is an integer number (85680609).

Almost surely, 2^171361217 is an apocalyptic number.

It is an amenable number.

171361217 is a deficient number, since it is larger than the sum of its proper divisors (1).

171361217 is an equidigital number, since it uses as much as digits as its factorization.

171361217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764, while the sum is 29.

The square root of 171361217 is about 13090.5010217333. The cubic root of 171361217 is about 555.4404608878.

The spelling of 171361217 in words is "one hundred seventy-one million, three hundred sixty-one thousand, two hundred seventeen".