13438911 has 8 divisors (see below), whose sum is σ = 18120240. Its totient is φ = 8858432.

The previous prime is 13438889. The next prime is 13438913. The reversal of 13438911 is 11983431.

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 13438911 - 2²² = 9244607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13438913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24900 + ... + 25433.

It is an arithmetic number, because the mean of its divisors is an integer number (2265030).

Almost surely, 2^13438911 is an apocalyptic number.

13438911 is a deficient number, since it is larger than the sum of its proper divisors (4681329).

13438911 is an equidigital number, since it uses as much as digits as its factorization.

13438911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50425.

The product of its digits is 2592, while the sum is 30.

The square root of 13438911 is about 3665.9120284044. The cubic root of 13438911 is about 237.7504563785.

The spelling of 13438911 in words is "thirteen million, four hundred thirty-eight thousand, nine hundred eleven".