8719987 has 2 divisors, whose sum is σ = 8719988. Its totient is φ = 8719986.

The previous prime is 8719961. The next prime is 8719999. The reversal of 8719987 is 7899178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8719987 - 2¹¹ = 8717939 is a prime.

It is a Chen prime.

8719987 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8719987.

It is not a weakly prime, because it can be changed into another prime (8719187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4359993 + 4359994.

It is an arithmetic number, because the mean of its divisors is an integer number (4359994).

Almost surely, 2^8719987 is an apocalyptic number.

8719987 is a deficient number, since it is larger than the sum of its proper divisors (1).

8719987 is an equidigital number, since it uses as much as digits as its factorization.

8719987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 49.

The square root of 8719987 is about 2952.9624108681. The cubic root of 8719987 is about 205.8283910294.

The spelling of 8719987 in words is "eight million, seven hundred nineteen thousand, nine hundred eighty-seven".