136644337 has 2 divisors, whose sum is σ = 136644338. Its totient is φ = 136644336.

The previous prime is 136644323. The next prime is 136644407. The reversal of 136644337 is 733446631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85821696 + 50822641 = 9264^2 + 7129^2 .

It is an emirp because it is prime and its reverse (733446631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136644337 - 2²⁷ = 2426609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136644296 and 136644305.

It is not a weakly prime, because it can be changed into another prime (136644437) 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 as a sum of consecutive naturals, namely, 68322168 + 68322169.

It is an arithmetic number, because the mean of its divisors is an integer number (68322169).

Almost surely, 2^136644337 is an apocalyptic number.

It is an amenable number.

136644337 is a deficient number, since it is larger than the sum of its proper divisors (1).

136644337 is an equidigital number, since it uses as much as digits as its factorization.

136644337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 37.

The square root of 136644337 is about 11689.4968668459. The cubic root of 136644337 is about 515.0671819857.

The spelling of 136644337 in words is "one hundred thirty-six million, six hundred forty-four thousand, three hundred thirty-seven".