9950021 has 2 divisors, whose sum is σ = 9950022. Its totient is φ = 9950020.

The previous prime is 9949967. The next prime is 9950023. The reversal of 9950021 is 1200599.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7022500 + 2927521 = 2650^2 + 1711^2 .

It is a cyclic number.

It is not a de Polignac number, because 9950021 - 2¹⁸ = 9687877 is a prime.

It is a super-3 number, since 3×9950021³ (a number of 22 digits) contains 333 as substring.

Together with 9950023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9950023) 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, 4975010 + 4975011.

It is an arithmetic number, because the mean of its divisors is an integer number (4975011).

Almost surely, 2^9950021 is an apocalyptic number.

It is an amenable number.

9950021 is a deficient number, since it is larger than the sum of its proper divisors (1).

9950021 is an equidigital number, since it uses as much as digits as its factorization.

9950021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 9950021 is about 3154.3653878395. The cubic root of 9950021 is about 215.0839477480.

The spelling of 9950021 in words is "nine million, nine hundred fifty thousand, twenty-one".