135243523 has 8 divisors (see below), whose sum is σ = 138107088. Its totient is φ = 132407424.

The previous prime is 135243509. The next prime is 135243529. The reversal of 135243523 is 325342531.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135243523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135243491 and 135243500.

It is not an unprimeable number, because it can be changed into a prime (135243529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3240 + ... + 16762.

It is an arithmetic number, because the mean of its divisors is an integer number (17263386).

Almost surely, 2^135243523 is an apocalyptic number.

135243523 is a deficient number, since it is larger than the sum of its proper divisors (2863565).

135243523 is a wasteful number, since it uses less digits than its factorization.

135243523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13733.

The product of its digits is 10800, while the sum is 28.

The square root of 135243523 is about 11629.4248782990. The cubic root of 135243523 is about 513.3010568432.

The spelling of 135243523 in words is "one hundred thirty-five million, two hundred forty-three thousand, five hundred twenty-three".