13188947 has 2 divisors, whose sum is σ = 13188948. Its totient is φ = 13188946.

The previous prime is 13188943. The next prime is 13188961. The reversal of 13188947 is 74988131.

It is a weak prime.

It is an emirp because it is prime and its reverse (74988131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13188947 - 2² = 13188943 is a prime.

It is not a weakly prime, because it can be changed into another prime (13188941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6594473 + 6594474.

It is an arithmetic number, because the mean of its divisors is an integer number (6594474).

Almost surely, 2^13188947 is an apocalyptic number.

13188947 is a deficient number, since it is larger than the sum of its proper divisors (1).

13188947 is an equidigital number, since it uses as much as digits as its factorization.

13188947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 41.

The square root of 13188947 is about 3631.6589872949. The cubic root of 13188947 is about 236.2671672715.

The spelling of 13188947 in words is "thirteen million, one hundred eighty-eight thousand, nine hundred forty-seven".