138305627 has 2 divisors, whose sum is σ = 138305628. Its totient is φ = 138305626.

The previous prime is 138305599. The next prime is 138305641. The reversal of 138305627 is 726503831.

It is a strong prime.

It is an emirp because it is prime and its reverse (726503831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138305627 - 2¹⁸ = 138043483 is a prime.

It is not a weakly prime, because it can be changed into another prime (138305927) 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 as a sum of consecutive naturals, namely, 69152813 + 69152814.

It is an arithmetic number, because the mean of its divisors is an integer number (69152814).

Almost surely, 2^138305627 is an apocalyptic number.

138305627 is a deficient number, since it is larger than the sum of its proper divisors (1).

138305627 is an equidigital number, since it uses as much as digits as its factorization.

138305627 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 138305627 is about 11760.3412790616. The cubic root of 138305627 is about 517.1461350505.

The spelling of 138305627 in words is "one hundred thirty-eight million, three hundred five thousand, six hundred twenty-seven".