444816409 has 2 divisors, whose sum is σ = 444816410. Its totient is φ = 444816408.

The previous prime is 444816377. The next prime is 444816451. The reversal of 444816409 is 904618444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 443228809 + 1587600 = 21053^2 + 1260^2 .

It is a cyclic number.

It is not a de Polignac number, because 444816409 - 2⁵ = 444816377 is a prime.

It is not a weakly prime, because it can be changed into another prime (444817409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222408204 + 222408205.

It is an arithmetic number, because the mean of its divisors is an integer number (222408205).

Almost surely, 2^444816409 is an apocalyptic number.

It is an amenable number.

444816409 is a deficient number, since it is larger than the sum of its proper divisors (1).

444816409 is an equidigital number, since it uses as much as digits as its factorization.

444816409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 444816409 is about 21090.6711367846. The cubic root of 444816409 is about 763.3556655662.

The spelling of 444816409 in words is "four hundred forty-four million, eight hundred sixteen thousand, four hundred nine".