138108323 has 4 divisors (see below), whose sum is σ = 146232360. Its totient is φ = 129984288.

The previous prime is 138108319. The next prime is 138108343. The reversal of 138108323 is 323801831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323801831 = 109 ⋅2970659.

It is a cyclic number.

It is not a de Polignac number, because 138108323 - 2² = 138108319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138108343) 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, 4061993 + ... + 4062026.

It is an arithmetic number, because the mean of its divisors is an integer number (36558090).

Almost surely, 2^138108323 is an apocalyptic number.

138108323 is a deficient number, since it is larger than the sum of its proper divisors (8124037).

138108323 is an equidigital number, since it uses as much as digits as its factorization.

138108323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8124036.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 138108323 is about 11751.9497531261. The cubic root of 138108323 is about 516.9001012916.

The spelling of 138108323 in words is "one hundred thirty-eight million, one hundred eight thousand, three hundred twenty-three".