445009009 has 2 divisors, whose sum is σ = 445009010. Its totient is φ = 445009008.

The previous prime is 445009007. The next prime is 445009049. The reversal of 445009009 is 900900544.

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., 337824400 + 107184609 = 18380^2 + 10353^2 .

It is a cyclic number.

It is not a de Polignac number, because 445009009 - 2¹ = 445009007 is a prime.

Together with 445009007, it forms a pair of twin primes.

It is a Chen prime.

445009009 is a modest number, since divided by 9009 gives 445 as remainder.

It is not a weakly prime, because it can be changed into another prime (445009001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222504504 + 222504505.

It is an arithmetic number, because the mean of its divisors is an integer number (222504505).

Almost surely, 2^445009009 is an apocalyptic number.

It is an amenable number.

445009009 is a deficient number, since it is larger than the sum of its proper divisors (1).

445009009 is an equidigital number, since it uses as much as digits as its factorization.

445009009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 445009009 is about 21095.2366424271. The cubic root of 445009009 is about 763.4658241873.

The spelling of 445009009 in words is "four hundred forty-five million, nine thousand, nine".