135748181 has 2 divisors, whose sum is σ = 135748182. Its totient is φ = 135748180.

The previous prime is 135748061. The next prime is 135748183. The reversal of 135748181 is 181847531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94672900 + 41075281 = 9730^2 + 6409^2 .

It is an emirp because it is prime and its reverse (181847531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135748181 - 2¹⁸ = 135486037 is a prime.

It is a super-2 number, since 2×135748181² = 36855137289617522, which contains 22 as substring.

Together with 135748183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135748183) 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, 67874090 + 67874091.

It is an arithmetic number, because the mean of its divisors is an integer number (67874091).

Almost surely, 2^135748181 is an apocalyptic number.

It is an amenable number.

135748181 is a deficient number, since it is larger than the sum of its proper divisors (1).

135748181 is an equidigital number, since it uses as much as digits as its factorization.

135748181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 38.

The square root of 135748181 is about 11651.1021367079. The cubic root of 135748181 is about 513.9387212649.

The spelling of 135748181 in words is "one hundred thirty-five million, seven hundred forty-eight thousand, one hundred eighty-one".