444309893 has 2 divisors, whose sum is σ = 444309894. Its totient is φ = 444309892.

The previous prime is 444309869. The next prime is 444309937. The reversal of 444309893 is 398903444.

It is an a-pointer prime, because the next prime (444309937) can be obtained adding 444309893 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 428572804 + 15737089 = 20702^2 + 3967^2 .

It is a cyclic number.

It is not a de Polignac number, because 444309893 - 2¹⁰ = 444308869 is a prime.

It is a super-2 number, since 2×444309893² = 394822562035342898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444309823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222154946 + 222154947.

It is an arithmetic number, because the mean of its divisors is an integer number (222154947).

Almost surely, 2^444309893 is an apocalyptic number.

It is an amenable number.

444309893 is a deficient number, since it is larger than the sum of its proper divisors (1).

444309893 is an equidigital number, since it uses as much as digits as its factorization.

444309893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 444309893 is about 21078.6596585267. The cubic root of 444309893 is about 763.0658091187.

The spelling of 444309893 in words is "four hundred forty-four million, three hundred nine thousand, eight hundred ninety-three".