138232423 has 8 divisors (see below), whose sum is σ = 167272992. Its totient is φ = 111515136.

The previous prime is 138232421. The next prime is 138232439. The reversal of 138232423 is 324232831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138232423 - 2¹ = 138232421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138232391 and 138232400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138232421) 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 7 ways as a sum of consecutive naturals, for example, 580690 + ... + 580927.

It is an arithmetic number, because the mean of its divisors is an integer number (20909124).

Almost surely, 2^138232423 is an apocalyptic number.

138232423 is a deficient number, since it is larger than the sum of its proper divisors (29040569).

138232423 is a wasteful number, since it uses less digits than its factorization.

138232423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161641.

The product of its digits is 6912, while the sum is 28.

The square root of 138232423 is about 11757.2285424755. The cubic root of 138232423 is about 517.0548785880.

The spelling of 138232423 in words is "one hundred thirty-eight million, two hundred thirty-two thousand, four hundred twenty-three".