540091289 has 2 divisors, whose sum is σ = 540091290. Its totient is φ = 540091288.

The previous prime is 540091271. The next prime is 540091291. The reversal of 540091289 is 982190045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 537312400 + 2778889 = 23180^2 + 1667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-540091289 is a prime.

Together with 540091291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (540091219) 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 as a sum of consecutive naturals, namely, 270045644 + 270045645.

It is an arithmetic number, because the mean of its divisors is an integer number (270045645).

Almost surely, 2^540091289 is an apocalyptic number.

It is an amenable number.

540091289 is a deficient number, since it is larger than the sum of its proper divisors (1).

540091289 is an equidigital number, since it uses as much as digits as its factorization.

540091289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 540091289 is about 23239.8642207738. The cubic root of 540091289 is about 814.3711706280.

The spelling of 540091289 in words is "five hundred forty million, ninety-one thousand, two hundred eighty-nine".