445642289 has 2 divisors, whose sum is σ = 445642290. Its totient is φ = 445642288.

The previous prime is 445642279. The next prime is 445642343. The reversal of 445642289 is 982246544.

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., 434305600 + 11336689 = 20840^2 + 3367^2 .

It is a cyclic number.

It is not a de Polignac number, because 445642289 - 2⁸ = 445642033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (445642279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222821144 + 222821145.

It is an arithmetic number, because the mean of its divisors is an integer number (222821145).

Almost surely, 2^445642289 is an apocalyptic number.

It is an amenable number.

445642289 is a deficient number, since it is larger than the sum of its proper divisors (1).

445642289 is an equidigital number, since it uses as much as digits as its factorization.

445642289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 552960, while the sum is 44.

The square root of 445642289 is about 21110.2413297432. The cubic root of 445642289 is about 763.8278082240.

The spelling of 445642289 in words is "four hundred forty-five million, six hundred forty-two thousand, two hundred eighty-nine".