136009 has 4 divisors (see below), whose sum is σ = 139216. Its totient is φ = 132804.

The previous prime is 135979. The next prime is 136013. The reversal of 136009 is 900631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 900631 = 167 ⋅5393.

It is a cyclic number.

It is not a de Polignac number, because 136009 - 2⁵ = 135977 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (136069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1539 + ... + 1624.

It is an arithmetic number, because the mean of its divisors is an integer number (34804).

2¹³⁶⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

136009 is a deficient number, since it is larger than the sum of its proper divisors (3207).

136009 is an equidigital number, since it uses as much as digits as its factorization.

136009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3206.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 136009 is about 368.7939804281. The cubic root of 136009 is about 51.4267661771.

The spelling of 136009 in words is "one hundred thirty-six thousand, nine".