136812637 has 4 divisors (see below), whose sum is σ = 147336700. Its totient is φ = 126288576.

The previous prime is 136812631. The next prime is 136812647. The reversal of 136812637 is 736218631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 736218631 = 19 ⋅38748349.

It can be written as a sum of positive squares in 2 ways, for example, as 18198756 + 118613881 = 4266^2 + 10891^2 .

It is a cyclic number.

It is not a de Polignac number, because 136812637 - 2⁷ = 136812509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136812596 and 136812605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136812631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5262012 + ... + 5262037.

It is an arithmetic number, because the mean of its divisors is an integer number (36834175).

Almost surely, 2^136812637 is an apocalyptic number.

It is an amenable number.

136812637 is a deficient number, since it is larger than the sum of its proper divisors (10524063).

136812637 is a wasteful number, since it uses less digits than its factorization.

136812637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10524062.

The product of its digits is 36288, while the sum is 37.

The square root of 136812637 is about 11696.6934216470. The cubic root of 136812637 is about 515.2785585752.

The spelling of 136812637 in words is "one hundred thirty-six million, eight hundred twelve thousand, six hundred thirty-seven".