445989317 has 2 divisors, whose sum is σ = 445989318. Its totient is φ = 445989316.

The previous prime is 445989311. The next prime is 445989331. The reversal of 445989317 is 713989544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398641156 + 47348161 = 19966^2 + 6881^2 .

It is a cyclic number.

It is not a de Polignac number, because 445989317 - 2⁶ = 445989253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445989311) 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, 222994658 + 222994659.

It is an arithmetic number, because the mean of its divisors is an integer number (222994659).

Almost surely, 2^445989317 is an apocalyptic number.

It is an amenable number.

445989317 is a deficient number, since it is larger than the sum of its proper divisors (1).

445989317 is an equidigital number, since it uses as much as digits as its factorization.

445989317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 50.

The square root of 445989317 is about 21118.4591530727. The cubic root of 445989317 is about 764.0260246473.

The spelling of 445989317 in words is "four hundred forty-five million, nine hundred eighty-nine thousand, three hundred seventeen".