171006109 has 2 divisors, whose sum is σ = 171006110. Its totient is φ = 171006108.

The previous prime is 171006107. The next prime is 171006133. The reversal of 171006109 is 901600171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90060100 + 80946009 = 9490^2 + 8997^2 .

It is a cyclic number.

It is not a de Polignac number, because 171006109 - 2¹ = 171006107 is a prime.

Together with 171006107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171006107) 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, 85503054 + 85503055.

It is an arithmetic number, because the mean of its divisors is an integer number (85503055).

Almost surely, 2^171006109 is an apocalyptic number.

It is an amenable number.

171006109 is a deficient number, since it is larger than the sum of its proper divisors (1).

171006109 is an equidigital number, since it uses as much as digits as its factorization.

171006109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 171006109 is about 13076.9304119889. The cubic root of 171006109 is about 555.0565199588.

The spelling of 171006109 in words is "one hundred seventy-one million, six thousand, one hundred nine".