171071543 has 2 divisors, whose sum is σ = 171071544. Its totient is φ = 171071542.

The previous prime is 171071521. The next prime is 171071581. The reversal of 171071543 is 345170171.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 171071543 - 2¹⁰ = 171070519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171071443) 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, 85535771 + 85535772.

It is an arithmetic number, because the mean of its divisors is an integer number (85535772).

Almost surely, 2^171071543 is an apocalyptic number.

171071543 is a deficient number, since it is larger than the sum of its proper divisors (1).

171071543 is an equidigital number, since it uses as much as digits as its factorization.

171071543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 171071543 is about 13079.4320595353. The cubic root of 171071543 is about 555.1273067806.

The spelling of 171071543 in words is "one hundred seventy-one million, seventy-one thousand, five hundred forty-three".