4433420921 has 2 divisors, whose sum is σ = 4433420922. Its totient is φ = 4433420920.

The previous prime is 4433420909. The next prime is 4433421001. The reversal of 4433420921 is 1290243344.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3359941225 + 1073479696 = 57965^2 + 32764^2 .

It is a cyclic number.

It is not a de Polignac number, because 4433420921 - 2¹⁰ = 4433419897 is a prime.

It is not a weakly prime, because it can be changed into another prime (4433420221) 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, 2216710460 + 2216710461.

It is an arithmetic number, because the mean of its divisors is an integer number (2216710461).

Almost surely, 2^4433420921 is an apocalyptic number.

It is an amenable number.

4433420921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4433420921 is an equidigital number, since it uses as much as digits as its factorization.

4433420921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 4433420921 is about 66583.9389117225. The cubic root of 4433420921 is about 1642.7809401698.

The spelling of 4433420921 in words is "four billion, four hundred thirty-three million, four hundred twenty thousand, nine hundred twenty-one".