8247997 has 2 divisors, whose sum is σ = 8247998. Its totient is φ = 8247996.

The previous prime is 8247991. The next prime is 8248013. The reversal of 8247997 is 7997428.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5354596 + 2893401 = 2314^2 + 1701^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8247997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8247991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4123998 + 4123999.

It is an arithmetic number, because the mean of its divisors is an integer number (4123999).

Almost surely, 2^8247997 is an apocalyptic number.

It is an amenable number.

8247997 is a deficient number, since it is larger than the sum of its proper divisors (1).

8247997 is an equidigital number, since it uses as much as digits as its factorization.

8247997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 8247997 is about 2871.9326245579. The cubic root of 8247997 is about 202.0456469726.

The spelling of 8247997 in words is "eight million, two hundred forty-seven thousand, nine hundred ninety-seven".