9998447 has 2 divisors, whose sum is σ = 9998448. Its totient is φ = 9998446.

The previous prime is 9998441. The next prime is 9998459. The reversal of 9998447 is 7448999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9998447 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9998395 and 9998404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9998441) 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, 4999223 + 4999224.

It is an arithmetic number, because the mean of its divisors is an integer number (4999224).

Almost surely, 2^9998447 is an apocalyptic number.

9998447 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998447 is an equidigital number, since it uses as much as digits as its factorization.

9998447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 9998447 is about 3162.0320997738. The cubic root of 9998447 is about 215.4323156356.

The spelling of 9998447 in words is "nine million, nine hundred ninety-eight thousand, four hundred forty-seven".