138473 has 4 divisors (see below), whose sum is σ = 140880. Its totient is φ = 136068.

The previous prime is 138469. The next prime is 138493. The reversal of 138473 is 374831.

138473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 138473 - 2² = 138469 is a prime.

It is a Duffinian number.

It is a plaindrome in base 7.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (138403) 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, 1115 + ... + 1232.

It is an arithmetic number, because the mean of its divisors is an integer number (35220).

2¹³⁸⁴⁷³ is an apocalyptic number.

It is an amenable number.

138473 is a deficient number, since it is larger than the sum of its proper divisors (2407).

138473 is an equidigital number, since it uses as much as digits as its factorization.

138473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406.

The product of its digits is 2016, while the sum is 26.

The square root of 138473 is about 372.1196044285. The cubic root of 138473 is about 51.7354662135.

The spelling of 138473 in words is "one hundred thirty-eight thousand, four hundred seventy-three".