13317949 has 4 divisors (see below), whose sum is σ = 13325980. Its totient is φ = 13309920.

The previous prime is 13317937. The next prime is 13317959. The reversal of 13317949 is 94971331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 11088900 + 2229049 = 3330^2 + 1493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13317949 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 (13317929) 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, 504 + ... + 5185.

It is an arithmetic number, because the mean of its divisors is an integer number (3331495).

Almost surely, 2^13317949 is an apocalyptic number.

It is an amenable number.

13317949 is a deficient number, since it is larger than the sum of its proper divisors (8031).

13317949 is an equidigital number, since it uses as much as digits as its factorization.

13317949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8030.

The product of its digits is 20412, while the sum is 37.

The square root of 13317949 is about 3649.3765220925. The cubic root of 13317949 is about 237.0349844799.

The spelling of 13317949 in words is "thirteen million, three hundred seventeen thousand, nine hundred forty-nine".