9909247 has 2 divisors, whose sum is σ = 9909248. Its totient is φ = 9909246.

The previous prime is 9909217. The next prime is 9909253. The reversal of 9909247 is 7429099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9909247 - 2¹⁵ = 9876479 is a prime.

It is a super-2 number, since 2×9909247² = 196386352214018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9909217) 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, 4954623 + 4954624.

It is an arithmetic number, because the mean of its divisors is an integer number (4954624).

Almost surely, 2^9909247 is an apocalyptic number.

9909247 is a deficient number, since it is larger than the sum of its proper divisors (1).

9909247 is an equidigital number, since it uses as much as digits as its factorization.

9909247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 9909247 is about 3147.8956463009. The cubic root of 9909247 is about 214.7897493915.

The spelling of 9909247 in words is "nine million, nine hundred nine thousand, two hundred forty-seven".