9743232721 has 2 divisors, whose sum is σ = 9743232722. Its totient is φ = 9743232720.

The previous prime is 9743232679. The next prime is 9743232731. The reversal of 9743232721 is 1272323479.

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., 9357660225 + 385572496 = 96735^2 + 19636^2 .

It is a cyclic number.

It is not a de Polignac number, because 9743232721 - 2¹⁷ = 9743101649 is a prime.

It is not a weakly prime, because it can be changed into another prime (9743232731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4871616360 + 4871616361.

It is an arithmetic number, because the mean of its divisors is an integer number (4871616361).

Almost surely, 2^9743232721 is an apocalyptic number.

It is an amenable number.

9743232721 is a deficient number, since it is larger than the sum of its proper divisors (1).

9743232721 is an equidigital number, since it uses as much as digits as its factorization.

9743232721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 40.

The square root of 9743232721 is about 98707.8148932495. The cubic root of 9743232721 is about 2135.8349653694.

The spelling of 9743232721 in words is "nine billion, seven hundred forty-three million, two hundred thirty-two thousand, seven hundred twenty-one".