135523123 has 2 divisors, whose sum is σ = 135523124. Its totient is φ = 135523122.

The previous prime is 135523051. The next prime is 135523139. The reversal of 135523123 is 321325531.

135523123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135523123 is a prime.

It is not a weakly prime, because it can be changed into another prime (135520123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67761561 + 67761562.

It is an arithmetic number, because the mean of its divisors is an integer number (67761562).

Almost surely, 2^135523123 is an apocalyptic number.

135523123 is a deficient number, since it is larger than the sum of its proper divisors (1).

135523123 is an equidigital number, since it uses as much as digits as its factorization.

135523123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 25.

The square root of 135523123 is about 11641.4399023488. The cubic root of 135523123 is about 513.6545431148.

Adding to 135523123 its reverse (321325531), we get a palindrome (456848654).

The spelling of 135523123 in words is "one hundred thirty-five million, five hundred twenty-three thousand, one hundred twenty-three".