4730821 has 2 divisors, whose sum is σ = 4730822. Its totient is φ = 4730820.

The previous prime is 4730819. The next prime is 4730837. The reversal of 4730821 is 1280374.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4730625 + 196 = 2175^2 + 14^2 .

It is a cyclic number.

It is not a de Polignac number, because 4730821 - 2¹ = 4730819 is a prime.

Together with 4730819, it forms a pair of twin primes.

4730821 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4730851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2365410 + 2365411.

It is an arithmetic number, because the mean of its divisors is an integer number (2365411).

Almost surely, 2^4730821 is an apocalyptic number.

It is an amenable number.

4730821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4730821 is an equidigital number, since it uses as much as digits as its factorization.

4730821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 4730821 is about 2175.0450570046. The cubic root of 4730821 is about 167.8722219052.

The spelling of 4730821 in words is "four million, seven hundred thirty thousand, eight hundred twenty-one".