9990047 has 2 divisors, whose sum is σ = 9990048. Its totient is φ = 9990046.

The previous prime is 9990017. The next prime is 9990089. The reversal of 9990047 is 7400999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9990047 - 2¹⁶ = 9924511 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9990017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995023 + 4995024.

It is an arithmetic number, because the mean of its divisors is an integer number (4995024).

Almost surely, 2^9990047 is an apocalyptic number.

9990047 is a deficient number, since it is larger than the sum of its proper divisors (1).

9990047 is an equidigital number, since it uses as much as digits as its factorization.

9990047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 9990047 is about 3160.7035609180. The cubic root of 9990047 is about 215.3719683148.

The spelling of 9990047 in words is "nine million, nine hundred ninety thousand, forty-seven".