9928813 has 2 divisors, whose sum is σ = 9928814. Its totient is φ = 9928812.

The previous prime is 9928783. The next prime is 9928843. The reversal of 9928813 is 3188299.

It is a balanced prime because it is at equal distance from previous prime (9928783) and next prime (9928843).

It can be written as a sum of positive squares in only one way, i.e., 5442889 + 4485924 = 2333^2 + 2118^2 .

It is a cyclic number.

It is not a de Polignac number, because 9928813 - 2¹³ = 9920621 is a prime.

9928813 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9928843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4964406 + 4964407.

It is an arithmetic number, because the mean of its divisors is an integer number (4964407).

Almost surely, 2^9928813 is an apocalyptic number.

It is an amenable number.

9928813 is a deficient number, since it is larger than the sum of its proper divisors (1).

9928813 is an equidigital number, since it uses as much as digits as its factorization.

9928813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 40.

The square root of 9928813 is about 3151.0019041568. The cubic root of 9928813 is about 214.9310252874.

The spelling of 9928813 in words is "nine million, nine hundred twenty-eight thousand, eight hundred thirteen".