138385747 has 2 divisors, whose sum is σ = 138385748. Its totient is φ = 138385746.

The previous prime is 138385717. The next prime is 138385771. The reversal of 138385747 is 747583831.

It is a strong prime.

It is an emirp because it is prime and its reverse (747583831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138385747 - 2¹¹ = 138383699 is a prime.

It is a super-2 number, since 2×138385747² = 38301229945496018, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 138385697 and 138385706.

It is not a weakly prime, because it can be changed into another prime (138385717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69192873 + 69192874.

It is an arithmetic number, because the mean of its divisors is an integer number (69192874).

Almost surely, 2^138385747 is an apocalyptic number.

138385747 is a deficient number, since it is larger than the sum of its proper divisors (1).

138385747 is an equidigital number, since it uses as much as digits as its factorization.

138385747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 46.

The square root of 138385747 is about 11763.7471496118. The cubic root of 138385747 is about 517.2459761320.

The spelling of 138385747 in words is "one hundred thirty-eight million, three hundred eighty-five thousand, seven hundred forty-seven".