8708989 has 4 divisors (see below), whose sum is σ = 8731324. Its totient is φ = 8686656.

The previous prime is 8708971. The next prime is 8709007. The reversal of 8708989 is 9898078.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (8708971) and next prime (8709007).

It can be written as a sum of positive squares in 2 ways, for example, as 3496900 + 5212089 = 1870^2 + 2283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8708989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8708969) 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 3 ways as a sum of consecutive naturals, for example, 10572 + ... + 11365.

It is an arithmetic number, because the mean of its divisors is an integer number (2182831).

Almost surely, 2^8708989 is an apocalyptic number.

It is an amenable number.

8708989 is a deficient number, since it is larger than the sum of its proper divisors (22335).

8708989 is a wasteful number, since it uses less digits than its factorization.

8708989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22334.

The product of its (nonzero) digits is 290304, while the sum is 49.

The square root of 8708989 is about 2951.0996255633. The cubic root of 8708989 is about 205.7418215960.

It can be divided in two parts, 87089 and 89, that added together give a palindrome (87178).

The spelling of 8708989 in words is "eight million, seven hundred eight thousand, nine hundred eighty-nine".