173081 has 2 divisors, whose sum is σ = 173082.
Its totient is φ = 173080.
The previous prime is 173059. The next prime is 173087. The reversal of 173081 is 180371.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 173056 + 25 = 416^2 + 5^2
It is an emirp because it is prime and its reverse (180371) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-173081 is a prime.
It is a super-2 number, since 2×1730812 = 59914065122, which contains 22 as substring.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (173087) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86540 + 86541.
It is an arithmetic number, because the mean of its divisors is an integer number (86541).
2173081 is an apocalyptic number.
It is an amenable number.
173081 is a deficient number, since it is larger than the sum of its proper divisors (1).
173081 is an equidigital number, since it uses as much as digits as its factorization.
173081 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 168, while the sum is 20.
The square root of 173081 is about 416.0300469918.
The cubic root of 173081 is about 55.7292414688.
The spelling of 173081 in words is "one hundred seventy-three thousand, eighty-one".