138864307 has 2 divisors, whose sum is σ = 138864308. Its totient is φ = 138864306.

The previous prime is 138864289. The next prime is 138864343. The reversal of 138864307 is 703468831.

138864307 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138864307 - 2¹¹ = 138862259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138864307.

It is not a weakly prime, because it can be changed into another prime (138864377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69432153 + 69432154.

It is an arithmetic number, because the mean of its divisors is an integer number (69432154).

Almost surely, 2^138864307 is an apocalyptic number.

138864307 is a deficient number, since it is larger than the sum of its proper divisors (1).

138864307 is an equidigital number, since it uses as much as digits as its factorization.

138864307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 138864307 is about 11784.0700524055. The cubic root of 138864307 is about 517.8415298653.

The spelling of 138864307 in words is "one hundred thirty-eight million, eight hundred sixty-four thousand, three hundred seven".