8987447897 has 2 divisors, whose sum is σ = 8987447898. Its totient is φ = 8987447896.

The previous prime is 8987447873. The next prime is 8987447923. The reversal of 8987447897 is 7987447898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5100673561 + 3886774336 = 71419^2 + 62344^2 .

It is a cyclic number.

It is not a de Polignac number, because 8987447897 - 2¹⁶ = 8987382361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8987447897.

It is not a weakly prime, because it can be changed into another prime (8987447827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4493723948 + 4493723949.

It is an arithmetic number, because the mean of its divisors is an integer number (4493723949).

Almost surely, 2^8987447897 is an apocalyptic number.

It is an amenable number.

8987447897 is a deficient number, since it is larger than the sum of its proper divisors (1).

8987447897 is an equidigital number, since it uses as much as digits as its factorization.

8987447897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 227598336, while the sum is 71.

The square root of 8987447897 is about 94802.1513310748. The cubic root of 8987447897 is about 2079.1163573522.

Subtracting from 8987447897 its reverse (7987447898), we obtain a palindrome (999999999).

The spelling of 8987447897 in words is "eight billion, nine hundred eighty-seven million, four hundred forty-seven thousand, eight hundred ninety-seven".