138373 has 2 divisors, whose sum is σ = 138374. Its totient is φ = 138372.

The previous prime is 138371. The next prime is 138389. The reversal of 138373 is 373831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101124 + 37249 = 318^2 + 193^2 .

It is a cyclic number.

It is not a de Polignac number, because 138373 - 2¹ = 138371 is a prime.

Together with 138371, it forms a pair of twin primes.

138373 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69186 + 69187.

It is an arithmetic number, because the mean of its divisors is an integer number (69187).

2¹³⁸³⁷³ is an apocalyptic number.

It is an amenable number.

138373 is a deficient number, since it is larger than the sum of its proper divisors (1).

138373 is an equidigital number, since it uses as much as digits as its factorization.

138373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 138373 is about 371.9852147599. The cubic root of 138373 is about 51.7230094109.

The spelling of 138373 in words is "one hundred thirty-eight thousand, three hundred seventy-three".