441440009 has 2 divisors, whose sum is σ = 441440010. Its totient is φ = 441440008.

The previous prime is 441439987. The next prime is 441440011. The reversal of 441440009 is 900044144.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376476409 + 64963600 = 19403^2 + 8060^2 .

It is a cyclic number.

It is not a de Polignac number, because 441440009 - 2¹² = 441435913 is a prime.

Together with 441440011, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 441440009.

It is not a weakly prime, because it can be changed into another prime (441440039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220720004 + 220720005.

It is an arithmetic number, because the mean of its divisors is an integer number (220720005).

Almost surely, 2^441440009 is an apocalyptic number.

It is an amenable number.

441440009 is a deficient number, since it is larger than the sum of its proper divisors (1).

441440009 is an equidigital number, since it uses as much as digits as its factorization.

441440009 is an evil number, because the sum of its binary digits is even.

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

The square root of 441440009 is about 21010.4737928491. The cubic root of 441440009 is about 761.4193288858.

The spelling of 441440009 in words is "four hundred forty-one million, four hundred forty thousand, nine".