4876728221 has 2 divisors, whose sum is σ = 4876728222. Its totient is φ = 4876728220.

The previous prime is 4876728173. The next prime is 4876728251. The reversal of 4876728221 is 1228276784.

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., 3205144996 + 1671583225 = 56614^2 + 40885^2 .

It is a cyclic number.

It is not a de Polignac number, because 4876728221 - 2¹⁰ = 4876727197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4876728251) 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, 2438364110 + 2438364111.

It is an arithmetic number, because the mean of its divisors is an integer number (2438364111).

Almost surely, 2^4876728221 is an apocalyptic number.

It is an amenable number.

4876728221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4876728221 is an equidigital number, since it uses as much as digits as its factorization.

4876728221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 602112, while the sum is 47.

The square root of 4876728221 is about 69833.5751698279. The cubic root of 4876728221 is about 1695.8060657945.

The spelling of 4876728221 in words is "four billion, eight hundred seventy-six million, seven hundred twenty-eight thousand, two hundred twenty-one".