136612213 has 4 divisors (see below), whose sum is σ = 136651788. Its totient is φ = 136572640.

The previous prime is 136612193. The next prime is 136612219. The reversal of 136612213 is 312216631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 123810129 + 12802084 = 11127^2 + 3578^2 .

It is a cyclic number.

It is not a de Polignac number, because 136612213 - 2⁹ = 136611701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136612219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14056 + ... + 21697.

It is an arithmetic number, because the mean of its divisors is an integer number (34162947).

Almost surely, 2^136612213 is an apocalyptic number.

It is an amenable number.

136612213 is a deficient number, since it is larger than the sum of its proper divisors (39575).

136612213 is an equidigital number, since it uses as much as digits as its factorization.

136612213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39574.

The product of its digits is 1296, while the sum is 25.

The square root of 136612213 is about 11688.1227320729. The cubic root of 136612213 is about 515.0268160857.

Adding to 136612213 its reverse (312216631), we get a palindrome (448828844).

The spelling of 136612213 in words is "one hundred thirty-six million, six hundred twelve thousand, two hundred thirteen".