136544123 has 4 divisors (see below), whose sum is σ = 142480848. Its totient is φ = 130607400.

The previous prime is 136544117. The next prime is 136544137. The reversal of 136544123 is 321445631.

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 136544123 - 2⁸ = 136543867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136544623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2968328 + ... + 2968373.

It is an arithmetic number, because the mean of its divisors is an integer number (35620212).

Almost surely, 2^136544123 is an apocalyptic number.

136544123 is a deficient number, since it is larger than the sum of its proper divisors (5936725).

136544123 is an equidigital number, since it uses as much as digits as its factorization.

136544123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5936724.

The product of its digits is 8640, while the sum is 29.

The square root of 136544123 is about 11685.2095830584. The cubic root of 136544123 is about 514.9412356363.

Adding to 136544123 its reverse (321445631), we get a palindrome (457989754).

The spelling of 136544123 in words is "one hundred thirty-six million, five hundred forty-four thousand, one hundred twenty-three".