135131273 has 2 divisors, whose sum is σ = 135131274. Its totient is φ = 135131272.

The previous prime is 135131237. The next prime is 135131303. The reversal of 135131273 is 372131531.

Together with previous prime (135131237) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77492809 + 57638464 = 8803^2 + 7592^2 .

It is an emirp because it is prime and its reverse (372131531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135131273 - 2¹⁰ = 135130249 is a prime.

It is not a weakly prime, because it can be changed into another prime (135131473) 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, 67565636 + 67565637.

It is an arithmetic number, because the mean of its divisors is an integer number (67565637).

Almost surely, 2^135131273 is an apocalyptic number.

It is an amenable number.

135131273 is a deficient number, since it is larger than the sum of its proper divisors (1).

135131273 is an equidigital number, since it uses as much as digits as its factorization.

135131273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 26.

The square root of 135131273 is about 11624.5977564817. The cubic root of 135131273 is about 513.1590069311.

The spelling of 135131273 in words is "one hundred thirty-five million, one hundred thirty-one thousand, two hundred seventy-three".