445589909 has 2 divisors, whose sum is σ = 445589910. Its totient is φ = 445589908.

The previous prime is 445589869. The next prime is 445589983. The reversal of 445589909 is 909985544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378185809 + 67404100 = 19447^2 + 8210^2 .

It is a cyclic number.

It is not a de Polignac number, because 445589909 - 2¹² = 445585813 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445589609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222794954 + 222794955.

It is an arithmetic number, because the mean of its divisors is an integer number (222794955).

Almost surely, 2^445589909 is an apocalyptic number.

It is an amenable number.

445589909 is a deficient number, since it is larger than the sum of its proper divisors (1).

445589909 is an equidigital number, since it uses as much as digits as its factorization.

445589909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2332800, while the sum is 53.

The square root of 445589909 is about 21109.0006632242. Note that the first 3 decimals coincide. The cubic root of 445589909 is about 763.7978807319.

The spelling of 445589909 in words is "four hundred forty-five million, five hundred eighty-nine thousand, nine hundred nine".