136644427 has 2 divisors, whose sum is σ = 136644428. Its totient is φ = 136644426.

The previous prime is 136644421. The next prime is 136644437. The reversal of 136644427 is 724446631.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136644427 is a prime.

It is not a weakly prime, because it can be changed into another prime (136644421) 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, 68322213 + 68322214.

It is an arithmetic number, because the mean of its divisors is an integer number (68322214).

Almost surely, 2^136644427 is an apocalyptic number.

136644427 is a deficient number, since it is larger than the sum of its proper divisors (1).

136644427 is an equidigital number, since it uses as much as digits as its factorization.

136644427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 37.

The square root of 136644427 is about 11689.5007164549. The cubic root of 136644427 is about 515.0672950677.

The spelling of 136644427 in words is "one hundred thirty-six million, six hundred forty-four thousand, four hundred twenty-seven".