8993816987 has 2 divisors, whose sum is σ = 8993816988. Its totient is φ = 8993816986.

The previous prime is 8993816971. The next prime is 8993816989. The reversal of 8993816987 is 7896183998.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8993816987 - 2⁴ = 8993816971 is a prime.

Together with 8993816989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8993816989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4496908493 + 4496908494.

It is an arithmetic number, because the mean of its divisors is an integer number (4496908494).

Almost surely, 2^8993816987 is an apocalyptic number.

8993816987 is a deficient number, since it is larger than the sum of its proper divisors (1).

8993816987 is an equidigital number, since it uses as much as digits as its factorization.

8993816987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47029248, while the sum is 68.

The square root of 8993816987 is about 94835.7368664366. The cubic root of 8993816987 is about 2079.6073737311.

The spelling of 8993816987 in words is "eight billion, nine hundred ninety-three million, eight hundred sixteen thousand, nine hundred eighty-seven".