2687 has 2 divisors, whose sum is σ = 2688.
Its totient is φ = 2686.
The previous prime is 2683. The next prime is 2689. The reversal of 2687 is 7862.
2687 is nontrivially palindromic in base 14.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 2687 - 22 = 2683 is a prime.
Together with 2689, it forms a pair of twin primes.
It is a Chen prime.
2687 is an undulating number in base 14.
It is a plaindrome in base 12.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (2683) by changing a digit.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1343 + 1344.
It is an arithmetic number, because the mean of its divisors is an integer number (1344).
22687 is an apocalyptic number.
2687 is a deficient number, since it is larger than the sum of its proper divisors (1).
2687 is an equidigital number, since it uses as much as digits as its factorization.
2687 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 672, while the sum is 23.
The square root of 2687 is about 51.8362807308.
The cubic root of 2687 is about 13.9023821461.
The spelling of 2687 in words is "two thousand, six hundred eighty-seven".