13316447 has 4 divisors (see below), whose sum is σ = 13466160. Its totient is φ = 13166736.

The previous prime is 13316419. The next prime is 13316449. The reversal of 13316447 is 74461331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13316447 - 2⁶ = 13316383 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 (13316449) 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, 74723 + ... + 74900.

It is an arithmetic number, because the mean of its divisors is an integer number (3366540).

Almost surely, 2^13316447 is an apocalyptic number.

13316447 is a deficient number, since it is larger than the sum of its proper divisors (149713).

13316447 is an equidigital number, since it uses as much as digits as its factorization.

13316447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149712.

The product of its digits is 6048, while the sum is 29.

The square root of 13316447 is about 3649.1707277134. The cubic root of 13316447 is about 237.0260731995.

Adding to 13316447 its reverse (74461331), we get a palindrome (87777778).

The spelling of 13316447 in words is "thirteen million, three hundred sixteen thousand, four hundred forty-seven".