8820947 has 2 divisors, whose sum is σ = 8820948. Its totient is φ = 8820946.

The previous prime is 8820923. The next prime is 8820961. The reversal of 8820947 is 7490288.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8820947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8820947.

It is not a weakly prime, because it can be changed into another prime (8820907) 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, 4410473 + 4410474.

It is an arithmetic number, because the mean of its divisors is an integer number (4410474).

Almost surely, 2^8820947 is an apocalyptic number.

8820947 is a deficient number, since it is larger than the sum of its proper divisors (1).

8820947 is an equidigital number, since it uses as much as digits as its factorization.

8820947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 8820947 is about 2970.0079124474. The cubic root of 8820947 is about 206.6197051927.

The spelling of 8820947 in words is "eight million, eight hundred twenty thousand, nine hundred forty-seven".