13438917 has 6 divisors (see below), whose sum is σ = 19411782. Its totient is φ = 8959272.

The previous prime is 13438913. The next prime is 13438921. The reversal of 13438917 is 71983431.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13438913) and next prime (13438921).

It can be written as a sum of positive squares in only one way, i.e., 9054081 + 4384836 = 3009^2 + 2094^2 .

It is not a de Polignac number, because 13438917 - 2² = 13438913 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 746598 + ... + 746615.

It is an arithmetic number, because the mean of its divisors is an integer number (3235297).

Almost surely, 2^13438917 is an apocalyptic number.

It is an amenable number.

13438917 is a deficient number, since it is larger than the sum of its proper divisors (5972865).

13438917 is a wasteful number, since it uses less digits than its factorization.

13438917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493219 (or 1493216 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 13438917 is about 3665.9128467545. The cubic root of 13438917 is about 237.7504917609.

The spelling of 13438917 in words is "thirteen million, four hundred thirty-eight thousand, nine hundred seventeen".