138182729 has 2 divisors, whose sum is σ = 138182730. Its totient is φ = 138182728.

The previous prime is 138182719. The next prime is 138182741. The reversal of 138182729 is 927281831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138180025 + 2704 = 11755^2 + 52^2 .

It is a cyclic number.

It is not a de Polignac number, because 138182729 - 2¹² = 138178633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138182719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69091364 + 69091365.

It is an arithmetic number, because the mean of its divisors is an integer number (69091365).

Almost surely, 2^138182729 is an apocalyptic number.

It is an amenable number.

138182729 is a deficient number, since it is larger than the sum of its proper divisors (1).

138182729 is an equidigital number, since it uses as much as digits as its factorization.

138182729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 138182729 is about 11755.1150143246. The cubic root of 138182729 is about 516.9929114455.

The spelling of 138182729 in words is "one hundred thirty-eight million, one hundred eighty-two thousand, seven hundred twenty-nine".