138307139 has 2 divisors, whose sum is σ = 138307140. Its totient is φ = 138307138.

The previous prime is 138307123. The next prime is 138307153. The reversal of 138307139 is 931703831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138307139 - 2⁴ = 138307123 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 138307099 and 138307108.

It is not a weakly prime, because it can be changed into another prime (138307339) 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, 69153569 + 69153570.

It is an arithmetic number, because the mean of its divisors is an integer number (69153570).

Almost surely, 2^138307139 is an apocalyptic number.

138307139 is a deficient number, since it is larger than the sum of its proper divisors (1).

138307139 is an equidigital number, since it uses as much as digits as its factorization.

138307139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 138307139 is about 11760.4055627346. The cubic root of 138307139 is about 517.1480195776.

The spelling of 138307139 in words is "one hundred thirty-eight million, three hundred seven thousand, one hundred thirty-nine".