8681689 has 6 divisors (see below), whose sum is σ = 9163050. Its totient is φ = 8224416.

The previous prime is 8681669. The next prime is 8681693. The reversal of 8681689 is 9861868.

It can be written as a sum of positive squares in only one way, i.e., 7382089 + 1299600 = 2717^2 + 1140^2 .

It is not a de Polignac number, because 8681689 - 2⁹ = 8681177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8681639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11664 + ... + 12385.

It is an arithmetic number, because the mean of its divisors is an integer number (1527175).

Almost surely, 2^8681689 is an apocalyptic number.

It is an amenable number.

8681689 is a deficient number, since it is larger than the sum of its proper divisors (481361).

8681689 is a wasteful number, since it uses less digits than its factorization.

8681689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24087 (or 24068 counting only the distinct ones).

The product of its digits is 165888, while the sum is 46.

The square root of 8681689 is about 2946.4706005660. The cubic root of 8681689 is about 205.5266174776.

The spelling of 8681689 in words is "eight million, six hundred eighty-one thousand, six hundred eighty-nine".