444216439 has 2 divisors, whose sum is σ = 444216440. Its totient is φ = 444216438.

The previous prime is 444216431. The next prime is 444216463. The reversal of 444216439 is 934612444.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 444216439 - 2³ = 444216431 is a prime.

It is a super-3 number, since 3×444216439³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 444216398 and 444216407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444216431) 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, 222108219 + 222108220.

It is an arithmetic number, because the mean of its divisors is an integer number (222108220).

Almost surely, 2^444216439 is an apocalyptic number.

444216439 is a deficient number, since it is larger than the sum of its proper divisors (1).

444216439 is an equidigital number, since it uses as much as digits as its factorization.

444216439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 37.

The square root of 444216439 is about 21076.4427501417. The cubic root of 444216439 is about 763.0123055066.

The spelling of 444216439 in words is "four hundred forty-four million, two hundred sixteen thousand, four hundred thirty-nine".