13138423 has 4 divisors (see below), whose sum is σ = 13261320. Its totient is φ = 13015528.

The previous prime is 13138403. The next prime is 13138439. The reversal of 13138423 is 32483131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32483131 = 89 ⋅364979.

It is a cyclic number.

It is not a de Polignac number, because 13138423 - 2¹³ = 13130231 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 (13138403) 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, 61288 + ... + 61501.

It is an arithmetic number, because the mean of its divisors is an integer number (3315330).

Almost surely, 2^13138423 is an apocalyptic number.

13138423 is a deficient number, since it is larger than the sum of its proper divisors (122897).

13138423 is a wasteful number, since it uses less digits than its factorization.

13138423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122896.

The product of its digits is 1728, while the sum is 25.

The square root of 13138423 is about 3624.6962631371. The cubic root of 13138423 is about 235.9650850866.

The spelling of 13138423 in words is "thirteen million, one hundred thirty-eight thousand, four hundred twenty-three".