135017123 has 2 divisors, whose sum is σ = 135017124. Its totient is φ = 135017122.

The previous prime is 135017089. The next prime is 135017137. The reversal of 135017123 is 321710531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135017123 - 2⁸ = 135016867 is a prime.

It is not a weakly prime, because it can be changed into another prime (135017143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67508561 + 67508562.

It is an arithmetic number, because the mean of its divisors is an integer number (67508562).

Almost surely, 2^135017123 is an apocalyptic number.

135017123 is a deficient number, since it is larger than the sum of its proper divisors (1).

135017123 is an equidigital number, since it uses as much as digits as its factorization.

135017123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 135017123 is about 11619.6868718567. The cubic root of 135017123 is about 513.0144719143.

Adding to 135017123 its reverse (321710531), we get a palindrome (456727654).

The spelling of 135017123 in words is "one hundred thirty-five million, seventeen thousand, one hundred twenty-three".