171442169 has 2 divisors, whose sum is σ = 171442170. Its totient is φ = 171442168.

The previous prime is 171442163. The next prime is 171442223. The reversal of 171442169 is 961244171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127418944 + 44023225 = 11288^2 + 6635^2 .

It is an emirp because it is prime and its reverse (961244171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171442169 - 2⁴ = 171442153 is a prime.

It is a super-2 number, since 2×171442169² = 58784834622849122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (171442163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85721084 + 85721085.

It is an arithmetic number, because the mean of its divisors is an integer number (85721085).

Almost surely, 2^171442169 is an apocalyptic number.

It is an amenable number.

171442169 is a deficient number, since it is larger than the sum of its proper divisors (1).

171442169 is an equidigital number, since it uses as much as digits as its factorization.

171442169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 171442169 is about 13093.5926696992. The cubic root of 171442169 is about 555.5279115148.

The spelling of 171442169 in words is "one hundred seventy-one million, four hundred forty-two thousand, one hundred sixty-nine".