138738659 has 2 divisors, whose sum is σ = 138738660. Its totient is φ = 138738658.

The previous prime is 138738569. The next prime is 138738707. The reversal of 138738659 is 956837831.

It is a happy number.

Together with previous prime (138738569) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138738659 - 2⁸ = 138738403 is a prime.

It is a super-2 number, since 2×138738659² = 38496831002236562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138737659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69369329 + 69369330.

It is an arithmetic number, because the mean of its divisors is an integer number (69369330).

Almost surely, 2^138738659 is an apocalyptic number.

138738659 is a deficient number, since it is larger than the sum of its proper divisors (1).

138738659 is an equidigital number, since it uses as much as digits as its factorization.

138738659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 50.

The square root of 138738659 is about 11778.7375809125. The cubic root of 138738659 is about 517.6852972854.

The spelling of 138738659 in words is "one hundred thirty-eight million, seven hundred thirty-eight thousand, six hundred fifty-nine".