4728732821 has 2 divisors, whose sum is σ = 4728732822. Its totient is φ = 4728732820.

The previous prime is 4728732797. The next prime is 4728732907. The reversal of 4728732821 is 1282378274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4653286225 + 75446596 = 68215^2 + 8686^2 .

It is a cyclic number.

It is not a de Polignac number, because 4728732821 - 2¹⁴ = 4728716437 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4728732221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2364366410 + 2364366411.

It is an arithmetic number, because the mean of its divisors is an integer number (2364366411).

Almost surely, 2^4728732821 is an apocalyptic number.

It is an amenable number.

4728732821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4728732821 is an equidigital number, since it uses as much as digits as its factorization.

4728732821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056, while the sum is 44.

The square root of 4728732821 is about 68765.7823412197. The cubic root of 4728732821 is about 1678.4751873435.

It can be divided in two parts, 47287 and 32821, that added together give a palindrome (80108).

The spelling of 4728732821 in words is "four billion, seven hundred twenty-eight million, seven hundred thirty-two thousand, eight hundred twenty-one".