138222373 has 4 divisors (see below), whose sum is σ = 138259008. Its totient is φ = 138185740.

The previous prime is 138222353. The next prime is 138222377. The reversal of 138222373 is 373222831.

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 138222373 - 2⁹ = 138221861 is a prime.

It is a super-2 number, since 2×138222373² = 38210848795502258, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138222377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11911 + ... + 20452.

It is an arithmetic number, because the mean of its divisors is an integer number (34564752).

Almost surely, 2^138222373 is an apocalyptic number.

It is an amenable number.

138222373 is a deficient number, since it is larger than the sum of its proper divisors (36635).

138222373 is an equidigital number, since it uses as much as digits as its factorization.

138222373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36634.

The product of its digits is 12096, while the sum is 31.

The square root of 138222373 is about 11756.8011380647. The cubic root of 138222373 is about 517.0423476942.

The spelling of 138222373 in words is "one hundred thirty-eight million, two hundred twenty-two thousand, three hundred seventy-three".