171687055 has 8 divisors (see below), whose sum is σ = 206135712. Its totient is φ = 137275488.

The previous prime is 171687053. The next prime is 171687071. The reversal of 171687055 is 550786171.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 171687055 - 2¹ = 171687053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 171686999 and 171687017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171687053) 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 in 7 ways as a sum of consecutive naturals, for example, 2209 + ... + 18661.

It is an arithmetic number, because the mean of its divisors is an integer number (25766964).

Almost surely, 2^171687055 is an apocalyptic number.

171687055 is a deficient number, since it is larger than the sum of its proper divisors (34448657).

171687055 is a wasteful number, since it uses less digits than its factorization.

171687055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18545.

The product of its (nonzero) digits is 58800, while the sum is 40.

The square root of 171687055 is about 13102.9407004687. The cubic root of 171687055 is about 555.7922888792.

The spelling of 171687055 in words is "one hundred seventy-one million, six hundred eighty-seven thousand, fifty-five".