548922721 has 2 divisors, whose sum is σ = 548922722. Its totient is φ = 548922720.

The previous prime is 548922691. The next prime is 548922727. The reversal of 548922721 is 127229845.

548922721 is digitally balanced in base 2, 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., 541958400 + 6964321 = 23280^2 + 2639^2 .

It is a cyclic number.

It is not a de Polignac number, because 548922721 - 2²⁵ = 515368289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (548922727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274461360 + 274461361.

It is an arithmetic number, because the mean of its divisors is an integer number (274461361).

Almost surely, 2^548922721 is an apocalyptic number.

It is an amenable number.

548922721 is a deficient number, since it is larger than the sum of its proper divisors (1).

548922721 is an equidigital number, since it uses as much as digits as its factorization.

548922721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The square root of 548922721 is about 23429.0998760089. The cubic root of 548922721 is about 818.7859890868.

The spelling of 548922721 in words is "five hundred forty-eight million, nine hundred twenty-two thousand, seven hundred twenty-one".