8540689 has 2 divisors, whose sum is σ = 8540690. Its totient is φ = 8540688.

The previous prime is 8540683. The next prime is 8540713. The reversal of 8540689 is 9860458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7952400 + 588289 = 2820^2 + 767^2 .

It is a cyclic number.

It is not a de Polignac number, because 8540689 - 2¹⁵ = 8507921 is a prime.

It is not a weakly prime, because it can be changed into another prime (8540683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4270344 + 4270345.

It is an arithmetic number, because the mean of its divisors is an integer number (4270345).

Almost surely, 2^8540689 is an apocalyptic number.

It is an amenable number.

8540689 is a deficient number, since it is larger than the sum of its proper divisors (1).

8540689 is an equidigital number, since it uses as much as digits as its factorization.

8540689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 8540689 is about 2922.4457223360. The cubic root of 8540689 is about 204.4078809083.

It can be divided in two parts, 8540 and 689, that added together give a palindrome (9229).

The spelling of 8540689 in words is "eight million, five hundred forty thousand, six hundred eighty-nine".