445002209 has 2 divisors, whose sum is σ = 445002210. Its totient is φ = 445002208.

The previous prime is 445002199. The next prime is 445002253. The reversal of 445002209 is 902200544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351937600 + 93064609 = 18760^2 + 9647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445002209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (445002269) 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, 222501104 + 222501105.

It is an arithmetic number, because the mean of its divisors is an integer number (222501105).

Almost surely, 2^445002209 is an apocalyptic number.

It is an amenable number.

445002209 is a deficient number, since it is larger than the sum of its proper divisors (1).

445002209 is an equidigital number, since it uses as much as digits as its factorization.

445002209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 445002209 is about 21095.0754679854. The cubic root of 445002209 is about 763.4619354315.

The spelling of 445002209 in words is "four hundred forty-five million, two thousand, two hundred nine".