7868687 has 2 divisors, whose sum is σ = 7868688. Its totient is φ = 7868686.

The previous prime is 7868677. The next prime is 7868689.

It is a happy number.

7868687 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 7868687 - 2⁸ = 7868431 is a prime.

Together with 7868689, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7868689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3934343 + 3934344.

It is an arithmetic number, because the mean of its divisors is an integer number (3934344).

Almost surely, 2^7868687 is an apocalyptic number.

7868687 is a deficient number, since it is larger than the sum of its proper divisors (1).

7868687 is an equidigital number, since it uses as much as digits as its factorization.

7868687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 50.

The square root of 7868687 is about 2805.1180010830. The cubic root of 7868687 is about 198.8996826095.

The spelling of 7868687 in words is "seven million, eight hundred sixty-eight thousand, six hundred eighty-seven".