445419389 has 2 divisors, whose sum is σ = 445419390. Its totient is φ = 445419388.

The previous prime is 445419383. The next prime is 445419419. The reversal of 445419389 is 983914544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397005625 + 48413764 = 19925^2 + 6958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445419389 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445419383) 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, 222709694 + 222709695.

It is an arithmetic number, because the mean of its divisors is an integer number (222709695).

Almost surely, 2^445419389 is an apocalyptic number.

It is an amenable number.

445419389 is a deficient number, since it is larger than the sum of its proper divisors (1).

445419389 is an equidigital number, since it uses as much as digits as its factorization.

445419389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 47.

The square root of 445419389 is about 21104.9612413764. The cubic root of 445419389 is about 763.7004372983.

The spelling of 445419389 in words is "four hundred forty-five million, four hundred nineteen thousand, three hundred eighty-nine".