2168687 has 2 divisors, whose sum is σ = 2168688. Its totient is φ = 2168686.

The previous prime is 2168671. The next prime is 2168689. The reversal of 2168687 is 7868612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2168687 - 2⁴ = 2168671 is a prime.

Together with 2168689, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2168687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2168689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084343 + 1084344.

It is an arithmetic number, because the mean of its divisors is an integer number (1084344).

2^2168687 is an apocalyptic number.

2168687 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168687 is an equidigital number, since it uses as much as digits as its factorization.

2168687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 2168687 is about 1472.6462575921. The cubic root of 2168687 is about 129.4391419595.

The spelling of 2168687 in words is "two million, one hundred sixty-eight thousand, six hundred eighty-seven".