138933629 has 2 divisors, whose sum is σ = 138933630. Its totient is φ = 138933628.

The previous prime is 138933601. The next prime is 138933637. The reversal of 138933629 is 926339831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126045529 + 12888100 = 11227^2 + 3590^2 .

It is an emirp because it is prime and its reverse (926339831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138933629 - 2¹² = 138929533 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138933629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138933029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69466814 + 69466815.

It is an arithmetic number, because the mean of its divisors is an integer number (69466815).

Almost surely, 2^138933629 is an apocalyptic number.

It is an amenable number.

138933629 is a deficient number, since it is larger than the sum of its proper divisors (1).

138933629 is an equidigital number, since it uses as much as digits as its factorization.

138933629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 44.

The square root of 138933629 is about 11787.0110290947. The cubic root of 138933629 is about 517.9276855268.

The spelling of 138933629 in words is "one hundred thirty-eight million, nine hundred thirty-three thousand, six hundred twenty-nine".