688171 has 8 divisors (see below), whose sum is σ = 761904. Its totient is φ = 616320.

The previous prime is 688159. The next prime is 688187. The reversal of 688171 is 171886.

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 688171 - 2⁵ = 688139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (688111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375 + ... + 1231.

It is an arithmetic number, because the mean of its divisors is an integer number (95238).

2⁶⁸⁸¹⁷¹ is an apocalyptic number.

688171 is a deficient number, since it is larger than the sum of its proper divisors (73733).

688171 is a wasteful number, since it uses less digits than its factorization.

688171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941.

The product of its digits is 2688, while the sum is 31.

The square root of 688171 is about 829.5607271321. The cubic root of 688171 is about 88.2874125465.

The spelling of 688171 in words is "six hundred eighty-eight thousand, one hundred seventy-one".