9823410721 has 2 divisors, whose sum is σ = 9823410722. Its totient is φ = 9823410720.

The previous prime is 9823410697. The next prime is 9823410749. The reversal of 9823410721 is 1270143289.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9052571025 + 770839696 = 95145^2 + 27764^2 .

It is a cyclic number.

It is not a de Polignac number, because 9823410721 - 2¹³ = 9823402529 is a prime.

It is not a weakly prime, because it can be changed into another prime (9823410521) 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, 4911705360 + 4911705361.

It is an arithmetic number, because the mean of its divisors is an integer number (4911705361).

Almost surely, 2^9823410721 is an apocalyptic number.

It is an amenable number.

9823410721 is a deficient number, since it is larger than the sum of its proper divisors (1).

9823410721 is an equidigital number, since it uses as much as digits as its factorization.

9823410721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 9823410721 is about 99113.1208317042. The cubic root of 9823410721 is about 2141.6776317815.

The spelling of 9823410721 in words is "nine billion, eight hundred twenty-three million, four hundred ten thousand, seven hundred twenty-one".