8993806987 has 8 divisors (see below), whose sum is σ = 9816686640. Its totient is φ = 8171804160.

The previous prime is 8993806919. The next prime is 8993806993. The reversal of 8993806987 is 7896083998.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8993806987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8993800987) 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 in 7 ways as a sum of consecutive naturals, for example, 197662 + ... + 238867.

It is an arithmetic number, because the mean of its divisors is an integer number (1227085830).

Almost surely, 2^8993806987 is an apocalyptic number.

8993806987 is a deficient number, since it is larger than the sum of its proper divisors (822879653).

8993806987 is a wasteful number, since it uses less digits than its factorization.

8993806987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438413.

The product of its (nonzero) digits is 47029248, while the sum is 67.

The square root of 8993806987 is about 94835.6841436809. The cubic root of 8993806987 is about 2079.6066029764.

The spelling of 8993806987 in words is "eight billion, nine hundred ninety-three million, eight hundred six thousand, nine hundred eighty-seven".