138067739 has 2 divisors, whose sum is σ = 138067740. Its totient is φ = 138067738.

The previous prime is 138067691. The next prime is 138067789. The reversal of 138067739 is 937760831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138067739 - 2¹² = 138063643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138067739.

It is not a weakly prime, because it can be changed into another prime (138067789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69033869 + 69033870.

It is an arithmetic number, because the mean of its divisors is an integer number (69033870).

Almost surely, 2^138067739 is an apocalyptic number.

138067739 is a deficient number, since it is larger than the sum of its proper divisors (1).

138067739 is an equidigital number, since it uses as much as digits as its factorization.

138067739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 138067739 is about 11750.2229340553. Note that the first 3 decimals coincide. The cubic root of 138067739 is about 516.8494648819.

The spelling of 138067739 in words is "one hundred thirty-eight million, sixty-seven thousand, seven hundred thirty-nine".