138223343 has 4 divisors (see below), whose sum is σ = 138250968. Its totient is φ = 138195720.

The previous prime is 138223331. The next prime is 138223361. The reversal of 138223343 is 343322831.

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

It is a cyclic number.

It is not a de Polignac number, because 138223343 - 2¹⁰ = 138222319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134223343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3968 + ... + 17093.

It is an arithmetic number, because the mean of its divisors is an integer number (34562742).

Almost surely, 2^138223343 is an apocalyptic number.

138223343 is a deficient number, since it is larger than the sum of its proper divisors (27625).

138223343 is an equidigital number, since it uses as much as digits as its factorization.

138223343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27624.

The product of its digits is 10368, while the sum is 29.

The square root of 138223343 is about 11756.8423907102. The cubic root of 138223343 is about 517.0435571701.

The spelling of 138223343 in words is "one hundred thirty-eight million, two hundred twenty-three thousand, three hundred forty-three".