4530709721 has 2 divisors, whose sum is σ = 4530709722. Its totient is φ = 4530709720.

The previous prime is 4530709639. The next prime is 4530709747. The reversal of 4530709721 is 1279070354.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3380143321 + 1150566400 = 58139^2 + 33920^2 .

It is a cyclic number.

It is not a de Polignac number, because 4530709721 - 2³⁰ = 3456967897 is a prime.

It is not a weakly prime, because it can be changed into another prime (4530709021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2265354860 + 2265354861.

It is an arithmetic number, because the mean of its divisors is an integer number (2265354861).

Almost surely, 2^4530709721 is an apocalyptic number.

It is an amenable number.

4530709721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4530709721 is an equidigital number, since it uses as much as digits as its factorization.

4530709721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 4530709721 is about 67310.5468778853. The cubic root of 4530709721 is about 1654.7107158602.

The spelling of 4530709721 in words is "four billion, five hundred thirty million, seven hundred nine thousand, seven hundred twenty-one".