171668093 has 2 divisors, whose sum is σ = 171668094. Its totient is φ = 171668092.

The previous prime is 171668089. The next prime is 171668117. The reversal of 171668093 is 390866171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97673689 + 73994404 = 9883^2 + 8602^2 .

It is an emirp because it is prime and its reverse (390866171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171668093 - 2² = 171668089 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 171668093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171668053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85834046 + 85834047.

It is an arithmetic number, because the mean of its divisors is an integer number (85834047).

Almost surely, 2^171668093 is an apocalyptic number.

It is an amenable number.

171668093 is a deficient number, since it is larger than the sum of its proper divisors (1).

171668093 is an equidigital number, since it uses as much as digits as its factorization.

171668093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 171668093 is about 13102.2171024602. The cubic root of 171668093 is about 555.7718266077.

The spelling of 171668093 in words is "one hundred seventy-one million, six hundred sixty-eight thousand, ninety-three".