135505273 has 2 divisors, whose sum is σ = 135505274. Its totient is φ = 135505272.

The previous prime is 135505267. The next prime is 135505291. The reversal of 135505273 is 372505531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101364624 + 34140649 = 10068^2 + 5843^2 .

It is an emirp because it is prime and its reverse (372505531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135505273 - 2¹⁷ = 135374201 is a prime.

It is not a weakly prime, because it can be changed into another prime (135505373) 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, 67752636 + 67752637.

It is an arithmetic number, because the mean of its divisors is an integer number (67752637).

Almost surely, 2^135505273 is an apocalyptic number.

It is an amenable number.

135505273 is a deficient number, since it is larger than the sum of its proper divisors (1).

135505273 is an equidigital number, since it uses as much as digits as its factorization.

135505273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15750, while the sum is 31.

The square root of 135505273 is about 11640.6732193632. The cubic root of 135505273 is about 513.6319906628.

The spelling of 135505273 in words is "one hundred thirty-five million, five hundred five thousand, two hundred seventy-three".