136564523 has 4 divisors (see below), whose sum is σ = 136635240. Its totient is φ = 136493808.

The previous prime is 136564513. The next prime is 136564541. The reversal of 136564523 is 325465631.

136564523 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.

It is a cyclic number.

It is not a de Polignac number, because 136564523 - 2⁶ = 136564459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136564513) 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, 32378 + ... + 36351.

It is an arithmetic number, because the mean of its divisors is an integer number (34158810).

Almost surely, 2^136564523 is an apocalyptic number.

136564523 is a deficient number, since it is larger than the sum of its proper divisors (70717).

136564523 is an equidigital number, since it uses as much as digits as its factorization.

136564523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70716.

The product of its digits is 64800, while the sum is 35.

The square root of 136564523 is about 11686.0824487935. The cubic root of 136564523 is about 514.9668788201.

The spelling of 136564523 in words is "one hundred thirty-six million, five hundred sixty-four thousand, five hundred twenty-three".