8947009 has 2 divisors, whose sum is σ = 8947010. Its totient is φ = 8947008.

The previous prime is 8946991. The next prime is 8947021. The reversal of 8947009 is 9007498.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7617600 + 1329409 = 2760^2 + 1153^2 .

It is a cyclic number.

It is not a de Polignac number, because 8947009 - 2¹³ = 8938817 is a prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (8947039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4473504 + 4473505.

It is an arithmetic number, because the mean of its divisors is an integer number (4473505).

Almost surely, 2^8947009 is an apocalyptic number.

It is an amenable number.

8947009 is a deficient number, since it is larger than the sum of its proper divisors (1).

8947009 is an equidigital number, since it uses as much as digits as its factorization.

8947009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 8947009 is about 2991.1551280400. The cubic root of 8947009 is about 207.5993350290.

The spelling of 8947009 in words is "eight million, nine hundred forty-seven thousand, nine".