135103123 has 2 divisors, whose sum is σ = 135103124. Its totient is φ = 135103122.

The previous prime is 135103121. The next prime is 135103147. The reversal of 135103123 is 321301531.

It is a weak prime.

It is an emirp because it is prime and its reverse (321301531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135103123 - 2¹ = 135103121 is a prime.

Together with 135103121, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 135103123.

It is not a weakly prime, because it can be changed into another prime (135103121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67551561 + 67551562.

It is an arithmetic number, because the mean of its divisors is an integer number (67551562).

Almost surely, 2^135103123 is an apocalyptic number.

135103123 is a deficient number, since it is larger than the sum of its proper divisors (1).

135103123 is an equidigital number, since it uses as much as digits as its factorization.

135103123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 135103123 is about 11623.3868988346. The cubic root of 135103123 is about 513.1233713872.

Adding to 135103123 its reverse (321301531), we get a palindrome (456404654).

The spelling of 135103123 in words is "one hundred thirty-five million, one hundred three thousand, one hundred twenty-three".