138139699 has 2 divisors, whose sum is σ = 138139700. Its totient is φ = 138139698.

The previous prime is 138139681. The next prime is 138139717. The reversal of 138139699 is 996931831.

138139699 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (138139681) and next prime (138139717).

It is a cyclic number.

It is not a de Polignac number, because 138139699 - 2⁹ = 138139187 is a prime.

It is not a weakly prime, because it can be changed into another prime (138139609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69069849 + 69069850.

It is an arithmetic number, because the mean of its divisors is an integer number (69069850).

Almost surely, 2^138139699 is an apocalyptic number.

138139699 is a deficient number, since it is larger than the sum of its proper divisors (1).

138139699 is an equidigital number, since it uses as much as digits as its factorization.

138139699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 49.

The square root of 138139699 is about 11753.2846047392. The cubic root of 138139699 is about 516.9392421370.

The spelling of 138139699 in words is "one hundred thirty-eight million, one hundred thirty-nine thousand, six hundred ninety-nine".