8408689 has 2 divisors, whose sum is σ = 8408690. Its totient is φ = 8408688.

The previous prime is 8408683. The next prime is 8408707. The reversal of 8408689 is 9868048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6426225 + 1982464 = 2535^2 + 1408^2 .

It is a cyclic number.

It is not a de Polignac number, because 8408689 - 2¹⁷ = 8277617 is a prime.

It is not a weakly prime, because it can be changed into another prime (8408683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4204344 + 4204345.

It is an arithmetic number, because the mean of its divisors is an integer number (4204345).

Almost surely, 2^8408689 is an apocalyptic number.

It is an amenable number.

8408689 is a deficient number, since it is larger than the sum of its proper divisors (1).

8408689 is an equidigital number, since it uses as much as digits as its factorization.

8408689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 8408689 is about 2899.7739567077. The cubic root of 8408689 is about 203.3493382248.

The spelling of 8408689 in words is "eight million, four hundred eight thousand, six hundred eighty-nine".