138773 has 4 divisors (see below), whose sum is σ = 140748. Its totient is φ = 136800.

The previous prime is 138763. The next prime is 138793. The reversal of 138773 is 377831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40804 + 97969 = 202^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 138773 - 2⁸ = 138517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 138773.

It is not an unprimeable number, because it can be changed into a prime (138763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 878 + ... + 1023.

It is an arithmetic number, because the mean of its divisors is an integer number (35187).

2¹³⁸⁷⁷³ is an apocalyptic number.

It is an amenable number.

138773 is a deficient number, since it is larger than the sum of its proper divisors (1975).

138773 is an equidigital number, since it uses as much as digits as its factorization.

138773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974.

The product of its digits is 3528, while the sum is 29.

The square root of 138773 is about 372.5224825430. The cubic root of 138773 is about 51.7728006756.

The spelling of 138773 in words is "one hundred thirty-eight thousand, seven hundred seventy-three".