9974821 has 2 divisors, whose sum is σ = 9974822. Its totient is φ = 9974820.

The previous prime is 9974807. The next prime is 9974827. The reversal of 9974821 is 1284799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8122500 + 1852321 = 2850^2 + 1361^2 .

It is a cyclic number.

It is not a de Polignac number, because 9974821 - 2⁹ = 9974309 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 (9974827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4987410 + 4987411.

It is an arithmetic number, because the mean of its divisors is an integer number (4987411).

Almost surely, 2^9974821 is an apocalyptic number.

It is an amenable number.

9974821 is a deficient number, since it is larger than the sum of its proper divisors (1).

9974821 is an equidigital number, since it uses as much as digits as its factorization.

9974821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 9974821 is about 3158.2940015141. The cubic root of 9974821 is about 215.2624953233.

The spelling of 9974821 in words is "nine million, nine hundred seventy-four thousand, eight hundred twenty-one".