13438823 has 4 divisors (see below), whose sum is σ = 14229360. Its totient is φ = 12648288.

The previous prime is 13438811. The next prime is 13438853. The reversal of 13438823 is 32883431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32883431 = 7 ⋅4697633.

It is a cyclic number.

It is not a de Polignac number, because 13438823 - 2¹⁰ = 13437799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13438823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13438853) 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, 395243 + ... + 395276.

It is an arithmetic number, because the mean of its divisors is an integer number (3557340).

Almost surely, 2^13438823 is an apocalyptic number.

13438823 is a deficient number, since it is larger than the sum of its proper divisors (790537).

13438823 is an equidigital number, since it uses as much as digits as its factorization.

13438823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790536.

The product of its digits is 13824, while the sum is 32.

The square root of 13438823 is about 3665.9000259145. The cubic root of 13438823 is about 237.7499374356.

The spelling of 13438823 in words is "thirteen million, four hundred thirty-eight thousand, eight hundred twenty-three".