540069689 has 2 divisors, whose sum is σ = 540069690. Its totient is φ = 540069688.

The previous prime is 540069683. The next prime is 540069701. The reversal of 540069689 is 986960045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 462981289 + 77088400 = 21517^2 + 8780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-540069689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (540069683) 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 as a sum of consecutive naturals, namely, 270034844 + 270034845.

It is an arithmetic number, because the mean of its divisors is an integer number (270034845).

Almost surely, 2^540069689 is an apocalyptic number.

It is an amenable number.

540069689 is a deficient number, since it is larger than the sum of its proper divisors (1).

540069689 is an equidigital number, since it uses as much as digits as its factorization.

540069689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 540069689 is about 23239.3994974053. The cubic root of 540069689 is about 814.3603140363.

The spelling of 540069689 in words is "five hundred forty million, sixty-nine thousand, six hundred eighty-nine".