135687281563289 has 2 divisors, whose sum is σ = 135687281563290. Its totient is φ = 135687281563288.

The previous prime is 135687281563277. The next prime is 135687281563367. The reversal of 135687281563289 is 982365182786531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106926767491600 + 28760514071689 = 10340540^2 + 5362883^2 .

It is an emirp because it is prime and its reverse (982365182786531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135687281563289 - 2⁸ = 135687281563033 is a prime.

It is a super-2 number, since 2×135687281563289² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135687283563289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67843640781644 + 67843640781645.

It is an arithmetic number, because the mean of its divisors is an integer number (67843640781645).

Almost surely, 2^{135687281563289} is an apocalyptic number.

It is an amenable number.

135687281563289 is a deficient number, since it is larger than the sum of its proper divisors (1).

135687281563289 is an equidigital number, since it uses as much as digits as its factorization.

135687281563289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1045094400, while the sum is 74.

The spelling of 135687281563289 in words is "one hundred thirty-five trillion, six hundred eighty-seven billion, two hundred eighty-one million, five hundred sixty-three thousand, two hundred eighty-nine".