444430309 has 2 divisors, whose sum is σ = 444430310. Its totient is φ = 444430308.

The previous prime is 444430289. The next prime is 444430319. The reversal of 444430309 is 903034444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 444282084 + 148225 = 21078^2 + 385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444430309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444430319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222215154 + 222215155.

It is an arithmetic number, because the mean of its divisors is an integer number (222215155).

Almost surely, 2^444430309 is an apocalyptic number.

It is an amenable number.

444430309 is a deficient number, since it is larger than the sum of its proper divisors (1).

444430309 is an equidigital number, since it uses as much as digits as its factorization.

444430309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 444430309 is about 21081.5158136221. The cubic root of 444430309 is about 763.1347377608.

The spelling of 444430309 in words is "four hundred forty-four million, four hundred thirty thousand, three hundred nine".