138674329 has 2 divisors, whose sum is σ = 138674330. Its totient is φ = 138674328.

The previous prime is 138674303. The next prime is 138674339. The reversal of 138674329 is 923476831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124835929 + 13838400 = 11173^2 + 3720^2 .

It is a cyclic number.

It is not a de Polignac number, because 138674329 - 2⁵ = 138674297 is a prime.

It is not a weakly prime, because it can be changed into another prime (138674339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69337164 + 69337165.

It is an arithmetic number, because the mean of its divisors is an integer number (69337165).

Almost surely, 2^138674329 is an apocalyptic number.

It is an amenable number.

138674329 is a deficient number, since it is larger than the sum of its proper divisors (1).

138674329 is an equidigital number, since it uses as much as digits as its factorization.

138674329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 43.

The square root of 138674329 is about 11776.0064962618. The cubic root of 138674329 is about 517.6052719006.

The spelling of 138674329 in words is "one hundred thirty-eight million, six hundred seventy-four thousand, three hundred twenty-nine".