171668117 has 2 divisors, whose sum is σ = 171668118. Its totient is φ = 171668116.

The previous prime is 171668093. The next prime is 171668129. The reversal of 171668117 is 711866171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125305636 + 46362481 = 11194^2 + 6809^2 .

It is an emirp because it is prime and its reverse (711866171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171668117 - 2⁶ = 171668053 is a prime.

It is equal to p_9591149 and since 171668117 and 9591149 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171668417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85834058 + 85834059.

It is an arithmetic number, because the mean of its divisors is an integer number (85834059).

Almost surely, 2^171668117 is an apocalyptic number.

It is an amenable number.

171668117 is a deficient number, since it is larger than the sum of its proper divisors (1).

171668117 is an equidigital number, since it uses as much as digits as its factorization.

171668117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 38.

The square root of 171668117 is about 13102.2180183357. The cubic root of 171668117 is about 555.7718525076.

The spelling of 171668117 in words is "one hundred seventy-one million, six hundred sixty-eight thousand, one hundred seventeen".