8247947 has 2 divisors, whose sum is σ = 8247948. Its totient is φ = 8247946.

The previous prime is 8247923. The next prime is 8247949. The reversal of 8247947 is 7497428.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8247947 - 2²⁰ = 7199371 is a prime.

Together with 8247949, 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 (8247949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4123973 + 4123974.

It is an arithmetic number, because the mean of its divisors is an integer number (4123974).

Almost surely, 2^8247947 is an apocalyptic number.

8247947 is a deficient number, since it is larger than the sum of its proper divisors (1).

8247947 is an equidigital number, since it uses as much as digits as its factorization.

8247947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 41.

The square root of 8247947 is about 2871.9239196051. The cubic root of 8247947 is about 202.0452386997.

The spelling of 8247947 in words is "eight million, two hundred forty-seven thousand, nine hundred forty-seven".