444140009 has 2 divisors, whose sum is σ = 444140010. Its totient is φ = 444140008.

The previous prime is 444139999. The next prime is 444140027. The reversal of 444140009 is 900041444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275659609 + 168480400 = 16603^2 + 12980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444140009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 444140009.

It is not a weakly prime, because it can be changed into another prime (444140509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222070004 + 222070005.

It is an arithmetic number, because the mean of its divisors is an integer number (222070005).

Almost surely, 2^444140009 is an apocalyptic number.

It is an amenable number.

444140009 is a deficient number, since it is larger than the sum of its proper divisors (1).

444140009 is an equidigital number, since it uses as much as digits as its factorization.

444140009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 444140009 is about 21074.6295103852. The cubic root of 444140009 is about 762.9685427742.

The spelling of 444140009 in words is "four hundred forty-four million, one hundred forty thousand, nine".