4445445439 has 2 divisors, whose sum is σ = 4445445440. Its totient is φ = 4445445438.

The previous prime is 4445445383. The next prime is 4445445457. The reversal of 4445445439 is 9345445444.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4445445439 - 2¹³ = 4445437247 is a prime.

It is a super-2 number, since 2×4445445439² = 39523970302251805442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4445445469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2222722719 + 2222722720.

It is an arithmetic number, because the mean of its divisors is an integer number (2222722720).

Almost surely, 2^4445445439 is an apocalyptic number.

4445445439 is a deficient number, since it is larger than the sum of its proper divisors (1).

4445445439 is an equidigital number, since it uses as much as digits as its factorization.

4445445439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2764800, while the sum is 46.

The square root of 4445445439 is about 66674.1737031664. The cubic root of 4445445439 is about 1644.2648068644.

The spelling of 4445445439 in words is "four billion, four hundred forty-five million, four hundred forty-five thousand, four hundred thirty-nine".