135863523 has 6 divisors (see below), whose sum is σ = 196247324. Its totient is φ = 90575676.

The previous prime is 135863503. The next prime is 135863551. The reversal of 135863523 is 325368531.

135863523 is a `hidden beast` number, since 13 + 5 + 8 + 635 + 2 + 3 = 666.

It is not a de Polignac number, because 135863523 - 2⁶ = 135863459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135863503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7547965 + ... + 7547982.

Almost surely, 2^135863523 is an apocalyptic number.

135863523 is a deficient number, since it is larger than the sum of its proper divisors (60383801).

135863523 is a wasteful number, since it uses less digits than its factorization.

135863523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15095953 (or 15095950 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 135863523 is about 11656.0509178709. The cubic root of 135863523 is about 514.0842405596.

The spelling of 135863523 in words is "one hundred thirty-five million, eight hundred sixty-three thousand, five hundred twenty-three".