171172871843 has 4 divisors (see below), whose sum is σ = 171325297608. Its totient is φ = 171020446080.

The previous prime is 171172871819. The next prime is 171172871873. The reversal of 171172871843 is 348178271171.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 171172871843 - 2¹⁰ = 171172870819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 171172871791 and 171172871800.

It is not an unprimeable number, because it can be changed into a prime (171172871873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76211198 + ... + 76213443.

It is an arithmetic number, because the mean of its divisors is an integer number (42831324402).

Almost surely, 2^171172871843 is an apocalyptic number.

171172871843 is a deficient number, since it is larger than the sum of its proper divisors (152425765).

171172871843 is a wasteful number, since it uses less digits than its factorization.

171172871843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152425764.

The product of its digits is 526848, while the sum is 50.

The spelling of 171172871843 in words is "one hundred seventy-one billion, one hundred seventy-two million, eight hundred seventy-one thousand, eight hundred forty-three".