9828241921 has 2 divisors, whose sum is σ = 9828241922. Its totient is φ = 9828241920.

The previous prime is 9828241903. The next prime is 9828241937. The reversal of 9828241921 is 1291428289.

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., 5267130625 + 4561111296 = 72575^2 + 67536^2 .

It is a cyclic number.

It is not a de Polignac number, because 9828241921 - 2¹³ = 9828233729 is a prime.

It is not a weakly prime, because it can be changed into another prime (9828241961) 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, 4914120960 + 4914120961.

It is an arithmetic number, because the mean of its divisors is an integer number (4914120961).

Almost surely, 2^9828241921 is an apocalyptic number.

It is an amenable number.

9828241921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9828241921 is an equidigital number, since it uses as much as digits as its factorization.

9828241921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 46.

The square root of 9828241921 is about 99137.4899873907. The cubic root of 9828241921 is about 2142.0286699806.

The spelling of 9828241921 in words is "nine billion, eight hundred twenty-eight million, two hundred forty-one thousand, nine hundred twenty-one".