171164261 has 2 divisors, whose sum is σ = 171164262. Its totient is φ = 171164260.

The previous prime is 171164249. The next prime is 171164263. The reversal of 171164261 is 162461171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165920161 + 5244100 = 12881^2 + 2290^2 .

It is an emirp because it is prime and its reverse (162461171) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171164261 is a prime.

It is a super-2 number, since 2×171164261² = 58594408487352242, which contains 22 as substring.

Together with 171164263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171164263) 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, 85582130 + 85582131.

It is an arithmetic number, because the mean of its divisors is an integer number (85582131).

Almost surely, 2^171164261 is an apocalyptic number.

It is an amenable number.

171164261 is a deficient number, since it is larger than the sum of its proper divisors (1).

171164261 is an equidigital number, since it uses as much as digits as its factorization.

171164261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 29.

The square root of 171164261 is about 13082.9759993665. The cubic root of 171164261 is about 555.2275786646.

The spelling of 171164261 in words is "one hundred seventy-one million, one hundred sixty-four thousand, two hundred sixty-one".