9999047 has 2 divisors, whose sum is σ = 9999048.
Its totient is φ = 9999046.
The previous prime is 9998977. The next prime is 9999049. The reversal of 9999047 is 7409999.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 9999047 - 212 = 9994951 is a prime.
Together with 9999049, it forms a pair of twin primes.
It is a Chen prime.
It is a junction number, because it is equal to n+sod(n) for n = 9998992 and 9999010.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (9999049) 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, 4999523 + 4999524.
It is an arithmetic number, because the mean of its divisors is an integer number (4999524).
Almost surely, 29999047 is an apocalyptic number.
9999047 is a deficient number, since it is larger than the sum of its proper divisors (1).
9999047 is an equidigital number, since it uses as much as digits as its factorization.
9999047 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 183708, while the sum is 47.
The square root of 9999047 is about 3162.1269740477.
The cubic root of 9999047 is about 215.4366248649.
The spelling of 9999047 in words is "nine million, nine hundred ninety-nine thousand, forty-seven".