135438523 has 8 divisors (see below), whose sum is σ = 149060016. Its totient is φ = 122035200.

The previous prime is 135438521. The next prime is 135438529. The reversal of 135438523 is 325834531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135438523 - 2¹ = 135438521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135438521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53238 + ... + 55723.

It is an arithmetic number, because the mean of its divisors is an integer number (18632502).

Almost surely, 2^135438523 is an apocalyptic number.

135438523 is a deficient number, since it is larger than the sum of its proper divisors (13621493).

135438523 is a wasteful number, since it uses less digits than its factorization.

135438523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109085.

The product of its digits is 43200, while the sum is 34.

The square root of 135438523 is about 11637.8057639746. The cubic root of 135438523 is about 513.5476383082.

The spelling of 135438523 in words is "one hundred thirty-five million, four hundred thirty-eight thousand, five hundred twenty-three".