8791247 has 2 divisors, whose sum is σ = 8791248. Its totient is φ = 8791246.

The previous prime is 8791229. The next prime is 8791249. The reversal of 8791247 is 7421978.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8791247 - 2⁶ = 8791183 is a prime.

Together with 8791249, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8791247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8791249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4395623 + 4395624.

It is an arithmetic number, because the mean of its divisors is an integer number (4395624).

Almost surely, 2^8791247 is an apocalyptic number.

8791247 is a deficient number, since it is larger than the sum of its proper divisors (1).

8791247 is an equidigital number, since it uses as much as digits as its factorization.

8791247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 8791247 is about 2965.0037099471. The cubic root of 8791247 is about 206.3875492635.

The spelling of 8791247 in words is "eight million, seven hundred ninety-one thousand, two hundred forty-seven".