4573444721 has 2 divisors, whose sum is σ = 4573444722. Its totient is φ = 4573444720.

The previous prime is 4573444693. The next prime is 4573444727. The reversal of 4573444721 is 1274443754.

4573444721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2542680625 + 2030764096 = 50425^2 + 45064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4573444721 is a prime.

It is not a weakly prime, because it can be changed into another prime (4573444727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2286722360 + 2286722361.

It is an arithmetic number, because the mean of its divisors is an integer number (2286722361).

Almost surely, 2^4573444721 is an apocalyptic number.

It is an amenable number.

4573444721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4573444721 is an equidigital number, since it uses as much as digits as its factorization.

4573444721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 376320, while the sum is 41.

The square root of 4573444721 is about 67627.2483618844. The cubic root of 4573444721 is about 1659.8970179739.

The spelling of 4573444721 in words is "four billion, five hundred seventy-three million, four hundred forty-four thousand, seven hundred twenty-one".