9998743 has 2 divisors, whose sum is σ = 9998744.
Its totient is φ = 9998742.
The previous prime is 9998741. The next prime is 9998749. The reversal of 9998743 is 3478999.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 9998743 - 21 = 9998741 is a prime.
Together with 9998741, it forms a pair of twin primes.
It is a nialpdrome in base 10.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (9998741) 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, 4999371 + 4999372.
It is an arithmetic number, because the mean of its divisors is an integer number (4999372).
Almost surely, 29998743 is an apocalyptic number.
9998743 is a deficient number, since it is larger than the sum of its proper divisors (1).
9998743 is an equidigital number, since it uses as much as digits as its factorization.
9998743 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 489888, while the sum is 49.
The square root of 9998743 is about 3162.0789047714.
The cubic root of 9998743 is about 215.4344415436.
The spelling of 9998743 in words is "nine million, nine hundred ninety-eight thousand, seven hundred forty-three".