171042759917 has 2 divisors, whose sum is σ = 171042759918. Its totient is φ = 171042759916.

The previous prime is 171042759893. The next prime is 171042759919. The reversal of 171042759917 is 719957240171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166552955881 + 4489804036 = 408109^2 + 67006^2 .

It is a cyclic number.

It is not a de Polignac number, because 171042759917 - 2⁸ = 171042759661 is a prime.

It is a super-4 number, since 4×171042759917⁴ (a number of 46 digits) contains 4444 as substring.

Together with 171042759919, 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 (171042759919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85521379958 + 85521379959.

It is an arithmetic number, because the mean of its divisors is an integer number (85521379959).

Almost surely, 2^171042759917 is an apocalyptic number.

It is an amenable number.

171042759917 is a deficient number, since it is larger than the sum of its proper divisors (1).

171042759917 is an equidigital number, since it uses as much as digits as its factorization.

171042759917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1111320, while the sum is 53.

The spelling of 171042759917 in words is "one hundred seventy-one billion, forty-two million, seven hundred fifty-nine thousand, nine hundred seventeen".