136445609 has 8 divisors (see below), whose sum is σ = 142853760. Its totient is φ = 130151056.

The previous prime is 136445557. The next prime is 136445627. The reversal of 136445609 is 906544631.

136445609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-136445609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136445629) 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, 25937 + ... + 30750.

It is an arithmetic number, because the mean of its divisors is an integer number (17856720).

Almost surely, 2^136445609 is an apocalyptic number.

It is an amenable number.

136445609 is a deficient number, since it is larger than the sum of its proper divisors (6408151).

136445609 is an equidigital number, since it uses as much as digits as its factorization.

136445609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56799.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 136445609 is about 11680.9934937059. The cubic root of 136445609 is about 514.8173657237.

The spelling of 136445609 in words is "one hundred thirty-six million, four hundred forty-five thousand, six hundred nine".