4323994721 has 2 divisors, whose sum is σ = 4323994722. Its totient is φ = 4323994720.

The previous prime is 4323994709. The next prime is 4323994747. The reversal of 4323994721 is 1274993234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4152384721 + 171610000 = 64439^2 + 13100^2 .

It is a cyclic number.

It is not a de Polignac number, because 4323994721 - 2⁶ = 4323994657 is a prime.

It is not a weakly prime, because it can be changed into another prime (4323994021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2161997360 + 2161997361.

It is an arithmetic number, because the mean of its divisors is an integer number (2161997361).

Almost surely, 2^4323994721 is an apocalyptic number.

It is an amenable number.

4323994721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4323994721 is an equidigital number, since it uses as much as digits as its factorization.

4323994721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 44.

The square root of 4323994721 is about 65757.0887509476. The cubic root of 4323994721 is about 1629.1524218309.

The spelling of 4323994721 in words is "four billion, three hundred twenty-three million, nine hundred ninety-four thousand, seven hundred twenty-one".