135404523 has 6 divisors (see below), whose sum is σ = 195584324. Its totient is φ = 90269676.

The previous prime is 135404513. The next prime is 135404551. The reversal of 135404523 is 325404531.

135404523 is a `hidden beast` number, since 135 + 4 + 0 + 4 + 523 = 666.

It is not a de Polignac number, because 135404523 - 2⁹ = 135404011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135404513) 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 in 5 ways as a sum of consecutive naturals, for example, 7522465 + ... + 7522482.

Almost surely, 2^135404523 is an apocalyptic number.

135404523 is a deficient number, since it is larger than the sum of its proper divisors (60179801).

135404523 is a wasteful number, since it uses less digits than its factorization.

135404523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15044953 (or 15044950 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 135404523 is about 11636.3449158230. The cubic root of 135404523 is about 513.5046616607.

The spelling of 135404523 in words is "one hundred thirty-five million, four hundred four thousand, five hundred twenty-three".