4021444439 has 2 divisors, whose sum is σ = 4021444440. Its totient is φ = 4021444438.

The previous prime is 4021444423. The next prime is 4021444457. The reversal of 4021444439 is 9344441204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4021444439 - 2⁴ = 4021444423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4021444399 and 4021444408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021444939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010722219 + 2010722220.

It is an arithmetic number, because the mean of its divisors is an integer number (2010722220).

Almost surely, 2^4021444439 is an apocalyptic number.

4021444439 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021444439 is an equidigital number, since it uses as much as digits as its factorization.

4021444439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 4021444439 is about 63414.8597648848. The cubic root of 4021444439 is about 1590.2327414004.

The spelling of 4021444439 in words is "four billion, twenty-one million, four hundred forty-four thousand, four hundred thirty-nine".