8987689 has 2 divisors, whose sum is σ = 8987690. Its totient is φ = 8987688.

The previous prime is 8987659. The next prime is 8987711. The reversal of 8987689 is 9867898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6165289 + 2822400 = 2483^2 + 1680^2 .

It is a cyclic number.

It is not a de Polignac number, because 8987689 - 2¹³ = 8979497 is a prime.

It is not a weakly prime, because it can be changed into another prime (8987609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4493844 + 4493845.

It is an arithmetic number, because the mean of its divisors is an integer number (4493845).

Almost surely, 2^8987689 is an apocalyptic number.

It is an amenable number.

8987689 is a deficient number, since it is larger than the sum of its proper divisors (1).

8987689 is an equidigital number, since it uses as much as digits as its factorization.

8987689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 55.

The square root of 8987689 is about 2997.9474645163. The cubic root of 8987689 is about 207.9134949086.

It can be divided in two parts, 89 and 87689, that added together give a palindrome (87778).

The spelling of 8987689 in words is "eight million, nine hundred eighty-seven thousand, six hundred eighty-nine".