12171688 has 16 divisors (see below), whose sum is σ = 23112000. Its totient is φ = 6008496.

The previous prime is 12171683. The next prime is 12171697. The reversal of 12171688 is 88617121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12171683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8998 + ... + 10261.

It is an arithmetic number, because the mean of its divisors is an integer number (1444500).

Almost surely, 2^12171688 is an apocalyptic number.

It is an amenable number.

12171688 is a deficient number, since it is larger than the sum of its proper divisors (10940312).

12171688 is a wasteful number, since it uses less digits than its factorization.

12171688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19344 (or 19340 counting only the distinct ones).

The product of its digits is 5376, while the sum is 34.

The square root of 12171688 is about 3488.7946342541. The cubic root of 12171688 is about 230.0295362194.

The spelling of 12171688 in words is "twelve million, one hundred seventy-one thousand, six hundred eighty-eight".