12831687 has 18 divisors (see below), whose sum is σ = 20374536. Its totient is φ = 7776120.

The previous prime is 12831667. The next prime is 12831701. The reversal of 12831687 is 78613821.

It is not a de Polignac number, because 12831687 - 2¹⁶ = 12766151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12831607) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4803 + ... + 6980.

Almost surely, 2^12831687 is an apocalyptic number.

12831687 is a deficient number, since it is larger than the sum of its proper divisors (7542849).

12831687 is a wasteful number, since it uses less digits than its factorization.

12831687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11811 (or 11797 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 12831687 is about 3582.1344195884. The cubic root of 12831687 is about 234.1142878052.

The spelling of 12831687 in words is "twelve million, eight hundred thirty-one thousand, six hundred eighty-seven".