136106609 has 4 divisors (see below), whose sum is σ = 139785204. Its totient is φ = 132428016.

The previous prime is 136106603. The next prime is 136106627. The reversal of 136106609 is 906601631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906601631 = 13 ⋅69738587.

It can be written as a sum of positive squares in 2 ways, for example, as 80156209 + 55950400 = 8953^2 + 7480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136106609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136106603) 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, 1839242 + ... + 1839315.

It is an arithmetic number, because the mean of its divisors is an integer number (34946301).

Almost surely, 2^136106609 is an apocalyptic number.

It is an amenable number.

136106609 is a deficient number, since it is larger than the sum of its proper divisors (3678595).

136106609 is an equidigital number, since it uses as much as digits as its factorization.

136106609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3678594.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 136106609 is about 11666.4737174521. The cubic root of 136106609 is about 514.3906564469.

The spelling of 136106609 in words is "one hundred thirty-six million, one hundred six thousand, six hundred nine".