13287947 has 2 divisors, whose sum is σ = 13287948. Its totient is φ = 13287946.

The previous prime is 13287941. The next prime is 13287949. The reversal of 13287947 is 74978231.

It is a strong prime.

It is an emirp because it is prime and its reverse (74978231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13287947 - 2¹⁶ = 13222411 is a prime.

Together with 13287949, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13287941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6643973 + 6643974.

It is an arithmetic number, because the mean of its divisors is an integer number (6643974).

Almost surely, 2^13287947 is an apocalyptic number.

13287947 is a deficient number, since it is larger than the sum of its proper divisors (1).

13287947 is an equidigital number, since it uses as much as digits as its factorization.

13287947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 13287947 is about 3645.2636392996. The cubic root of 13287947 is about 236.8568571907.

The spelling of 13287947 in words is "thirteen million, two hundred eighty-seven thousand, nine hundred forty-seven".