9998147 has 2 divisors, whose sum is σ = 9998148. Its totient is φ = 9998146.

The previous prime is 9998143. The next prime is 9998173. The reversal of 9998147 is 7418999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9998147 - 2² = 9998143 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (9998141) 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, 4999073 + 4999074.

It is an arithmetic number, because the mean of its divisors is an integer number (4999074).

Almost surely, 2^9998147 is an apocalyptic number.

9998147 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998147 is an equidigital number, since it uses as much as digits as its factorization.

9998147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 47.

The square root of 9998147 is about 3161.9846615694. The cubic root of 9998147 is about 215.4301609562.

The spelling of 9998147 in words is "nine million, nine hundred ninety-eight thousand, one hundred forty-seven".