688134171 has 16 divisors (see below), whose sum is σ = 958256640. Its totient is φ = 438419520.

The previous prime is 688134157. The next prime is 688134173. The reversal of 688134171 is 171431886.

It is not a de Polignac number, because 688134171 - 2⁷ = 688134043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (688134173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87231 + ... + 94791.

It is an arithmetic number, because the mean of its divisors is an integer number (59891040).

Almost surely, 2^688134171 is an apocalyptic number.

688134171 is a deficient number, since it is larger than the sum of its proper divisors (270122469).

688134171 is a wasteful number, since it uses less digits than its factorization.

688134171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8906.

The product of its digits is 32256, while the sum is 39.

The square root of 688134171 is about 26232.3115832364. The cubic root of 688134171 is about 882.8583755277.

The spelling of 688134171 in words is "six hundred eighty-eight million, one hundred thirty-four thousand, one hundred seventy-one".