444309869 has 2 divisors, whose sum is σ = 444309870. Its totient is φ = 444309868.

The previous prime is 444309863. The next prime is 444309893. The reversal of 444309869 is 968903444.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 362407369 + 81902500 = 19037^2 + 9050^2 .

It is a cyclic number.

It is not a de Polignac number, because 444309869 - 2¹² = 444305773 is a prime.

It is a super-2 number, since 2×444309869² = 394822519381594322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444309863) 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, 222154934 + 222154935.

It is an arithmetic number, because the mean of its divisors is an integer number (222154935).

Almost surely, 2^444309869 is an apocalyptic number.

It is an amenable number.

444309869 is a deficient number, since it is larger than the sum of its proper divisors (1).

444309869 is an equidigital number, since it uses as much as digits as its factorization.

444309869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 444309869 is about 21078.6590892305. The cubic root of 444309869 is about 763.0657953793.

The spelling of 444309869 in words is "four hundred forty-four million, three hundred nine thousand, eight hundred sixty-nine".