138733 has 4 divisors (see below), whose sum is σ = 158560. Its totient is φ = 118908.

The previous prime is 138731. The next prime is 138739. The reversal of 138733 is 337831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138733 - 2¹ = 138731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138698 and 138707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138731) 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 in 3 ways as a sum of consecutive naturals, for example, 9903 + ... + 9916.

It is an arithmetic number, because the mean of its divisors is an integer number (39640).

2¹³⁸⁷³³ is an apocalyptic number.

It is an amenable number.

138733 is a deficient number, since it is larger than the sum of its proper divisors (19827).

138733 is an equidigital number, since it uses as much as digits as its factorization.

138733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19826.

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

The square root of 138733 is about 372.4687906389. The cubic root of 138733 is about 51.7678258582.

The spelling of 138733 in words is "one hundred thirty-eight thousand, seven hundred thirty-three".