7987687 has 2 divisors, whose sum is σ = 7987688. Its totient is φ = 7987686.

The previous prime is 7987669. The next prime is 7987699. The reversal of 7987687 is 7867897.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7867897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7987687 - 2⁷ = 7987559 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7987607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3993843 + 3993844.

It is an arithmetic number, because the mean of its divisors is an integer number (3993844).

Almost surely, 2^7987687 is an apocalyptic number.

7987687 is a deficient number, since it is larger than the sum of its proper divisors (1).

7987687 is an equidigital number, since it uses as much as digits as its factorization.

7987687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 52.

The square root of 7987687 is about 2826.2496351172. The cubic root of 7987687 is about 199.8973389793.

The spelling of 7987687 in words is "seven million, nine hundred eighty-seven thousand, six hundred eighty-seven".