138727 has 2 divisors, whose sum is σ = 138728. Its totient is φ = 138726.

The previous prime is 138683. The next prime is 138731. The reversal of 138727 is 727831.

It is a happy number.

138727 is nontrivially palindromic in base 13.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138727 - 2⁷ = 138599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138695 and 138704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69363 + 69364.

It is an arithmetic number, because the mean of its divisors is an integer number (69364).

2¹³⁸⁷²⁷ is an apocalyptic number.

138727 is a deficient number, since it is larger than the sum of its proper divisors (1).

138727 is an equidigital number, since it uses as much as digits as its factorization.

138727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2352, while the sum is 28.

The square root of 138727 is about 372.4607361857. The cubic root of 138727 is about 51.7670795531.

The spelling of 138727 in words is "one hundred thirty-eight thousand, seven hundred twenty-seven".