138863 has 2 divisors, whose sum is σ = 138864. Its totient is φ = 138862.

The previous prime is 138841. The next prime is 138869. The reversal of 138863 is 368831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138863 - 2⁶ = 138799 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138869) 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, 69431 + 69432.

It is an arithmetic number, because the mean of its divisors is an integer number (69432).

2¹³⁸⁸⁶³ is an apocalyptic number.

138863 is a deficient number, since it is larger than the sum of its proper divisors (1).

138863 is an equidigital number, since it uses as much as digits as its factorization.

138863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 138863 is about 372.6432610420. The cubic root of 138863 is about 51.7839905207.

It can be divided in two parts, 138 and 863, that added together give a palindrome (1001).

The spelling of 138863 in words is "one hundred thirty-eight thousand, eight hundred sixty-three".