9930021 has 8 divisors (see below), whose sum is σ = 13335840. Its totient is φ = 6572112.

The previous prime is 9930001. The next prime is 9930031. The reversal of 9930021 is 1200399.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9930021 - 2⁷ = 9929893 is a prime.

9930021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9929973 and 9930000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9930001) 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 in 7 ways as a sum of consecutive naturals, for example, 11490 + ... + 12323.

It is an arithmetic number, because the mean of its divisors is an integer number (1666980).

Almost surely, 2^9930021 is an apocalyptic number.

It is an amenable number.

9930021 is a deficient number, since it is larger than the sum of its proper divisors (3405819).

9930021 is a wasteful number, since it uses less digits than its factorization.

9930021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23955.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 9930021 is about 3151.1935833903. The cubic root of 9930021 is about 214.9397415408.

The spelling of 9930021 in words is "nine million, nine hundred thirty thousand, twenty-one".