138476823 has 8 divisors (see below), whose sum is σ = 184749936. Its totient is φ = 92260800.

The previous prime is 138476773. The next prime is 138476837. The reversal of 138476823 is 328674831.

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

It is not a de Polignac number, because 138476823 - 2¹² = 138472727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138476323) 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, 8248 + ... + 18573.

It is an arithmetic number, because the mean of its divisors is an integer number (23093742).

Almost surely, 2^138476823 is an apocalyptic number.

138476823 is a deficient number, since it is larger than the sum of its proper divisors (46273113).

138476823 is a wasteful number, since it uses less digits than its factorization.

138476823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28545.

The product of its digits is 193536, while the sum is 42.

The square root of 138476823 is about 11767.6175583675. The cubic root of 138476823 is about 517.3594231806.

The spelling of 138476823 in words is "one hundred thirty-eight million, four hundred seventy-six thousand, eight hundred twenty-three".