135885623 has 4 divisors (see below), whose sum is σ = 136479240. Its totient is φ = 135292008.

The previous prime is 135885611. The next prime is 135885647. The reversal of 135885623 is 326588531.

135885623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326588531 = 487 ⋅670613.

It is a cyclic number.

It is not a de Polignac number, because 135885623 - 2⁶ = 135885559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135885653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296465 + ... + 296922.

It is an arithmetic number, because the mean of its divisors is an integer number (34119810).

Almost surely, 2^135885623 is an apocalyptic number.

135885623 is a deficient number, since it is larger than the sum of its proper divisors (593617).

135885623 is an equidigital number, since it uses as much as digits as its factorization.

135885623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593616.

The product of its digits is 172800, while the sum is 41.

The square root of 135885623 is about 11656.9988847902. The cubic root of 135885623 is about 514.1121132500.

The spelling of 135885623 in words is "one hundred thirty-five million, eight hundred eighty-five thousand, six hundred twenty-three".