171897030871 has 2 divisors, whose sum is σ = 171897030872. Its totient is φ = 171897030870.

The previous prime is 171897030829. The next prime is 171897030881. The reversal of 171897030871 is 178030798171.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 171897030871 - 2⁷ = 171897030743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171897030881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85948515435 + 85948515436.

It is an arithmetic number, because the mean of its divisors is an integer number (85948515436).

Almost surely, 2^171897030871 is an apocalyptic number.

171897030871 is a deficient number, since it is larger than the sum of its proper divisors (1).

171897030871 is an equidigital number, since it uses as much as digits as its factorization.

171897030871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 592704, while the sum is 52.

The spelling of 171897030871 in words is "one hundred seventy-one billion, eight hundred ninety-seven million, thirty thousand, eight hundred seventy-one".