9994021 has 2 divisors, whose sum is σ = 9994022. Its totient is φ = 9994020.

The previous prime is 9994003. The next prime is 9994027. The reversal of 9994021 is 1204999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9696996 + 297025 = 3114^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 9994021 - 2⁵ = 9993989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9994027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4997010 + 4997011.

It is an arithmetic number, because the mean of its divisors is an integer number (4997011).

Almost surely, 2^9994021 is an apocalyptic number.

It is an amenable number.

9994021 is a deficient number, since it is larger than the sum of its proper divisors (1).

9994021 is an equidigital number, since it uses as much as digits as its factorization.

9994021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 9994021 is about 3161.3321559115. The cubic root of 9994021 is about 215.4005225595.

The spelling of 9994021 in words is "nine million, nine hundred ninety-four thousand, twenty-one".