4434043021 has 2 divisors, whose sum is σ = 4434043022. Its totient is φ = 4434043020.

The previous prime is 4434042979. The next prime is 4434043039. The reversal of 4434043021 is 1203404344.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4102402500 + 331640521 = 64050^2 + 18211^2 .

It is a cyclic number.

It is not a de Polignac number, because 4434043021 - 2²³ = 4425654413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4434040021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2217021510 + 2217021511.

It is an arithmetic number, because the mean of its divisors is an integer number (2217021511).

Almost surely, 2^4434043021 is an apocalyptic number.

It is an amenable number.

4434043021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4434043021 is an equidigital number, since it uses as much as digits as its factorization.

4434043021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 4434043021 is about 66588.6102948545. The cubic root of 4434043021 is about 1642.8577752101.

Adding to 4434043021 its reverse (1203404344), we get a palindrome (5637447365).

The spelling of 4434043021 in words is "four billion, four hundred thirty-four million, forty-three thousand, twenty-one".