138199223 has 4 divisors (see below), whose sum is σ = 141139680. Its totient is φ = 135258768.

The previous prime is 138199211. The next prime is 138199231. The reversal of 138199223 is 322991831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322991831 = 431 ⋅749401.

It is a cyclic number.

It is not a de Polignac number, because 138199223 - 2⁴ = 138199207 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 (138199253) 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, 1470158 + ... + 1470251.

It is an arithmetic number, because the mean of its divisors is an integer number (35284920).

Almost surely, 2^138199223 is an apocalyptic number.

138199223 is a deficient number, since it is larger than the sum of its proper divisors (2940457).

138199223 is an equidigital number, since it uses as much as digits as its factorization.

138199223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940456.

The product of its digits is 23328, while the sum is 38.

The square root of 138199223 is about 11755.8165603245. The cubic root of 138199223 is about 517.0134806871.

The spelling of 138199223 in words is "one hundred thirty-eight million, one hundred ninety-nine thousand, two hundred twenty-three".