138046829 has 2 divisors, whose sum is σ = 138046830. Its totient is φ = 138046828.

The previous prime is 138046823. The next prime is 138046847. The reversal of 138046829 is 928640831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86062729 + 51984100 = 9277^2 + 7210^2 .

It is an emirp because it is prime and its reverse (928640831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138046829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138046823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69023414 + 69023415.

It is an arithmetic number, because the mean of its divisors is an integer number (69023415).

Almost surely, 2^138046829 is an apocalyptic number.

It is an amenable number.

138046829 is a deficient number, since it is larger than the sum of its proper divisors (1).

138046829 is an equidigital number, since it uses as much as digits as its factorization.

138046829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 138046829 is about 11749.3331300121. Note that the first 3 decimals coincide. The cubic root of 138046829 is about 516.8233717289.

The spelling of 138046829 in words is "one hundred thirty-eight million, forty-six thousand, eight hundred twenty-nine".