12117687 has 24 divisors (see below), whose sum is σ = 17410176. Its totient is φ = 7493904.

The previous prime is 12117659. The next prime is 12117689. The reversal of 12117687 is 78671121.

12117687 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12117687 - 2¹¹ = 12115639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12117689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72478 + ... + 72644.

It is an arithmetic number, because the mean of its divisors is an integer number (725424).

Almost surely, 2^12117687 is an apocalyptic number.

12117687 is a deficient number, since it is larger than the sum of its proper divisors (5292489).

12117687 is a wasteful number, since it uses less digits than its factorization.

12117687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 256 counting only the distinct ones).

The product of its digits is 4704, while the sum is 33.

The square root of 12117687 is about 3481.0468253099. The cubic root of 12117687 is about 229.6888483145.

The spelling of 12117687 in words is "twelve million, one hundred seventeen thousand, six hundred eighty-seven".