445187489 has 2 divisors, whose sum is σ = 445187490. Its totient is φ = 445187488.

The previous prime is 445187459. The next prime is 445187513. The reversal of 445187489 is 984781544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442681600 + 2505889 = 21040^2 + 1583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445187489 is a prime.

It is not a weakly prime, because it can be changed into another prime (445187429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222593744 + 222593745.

It is an arithmetic number, because the mean of its divisors is an integer number (222593745).

Almost surely, 2^445187489 is an apocalyptic number.

It is an amenable number.

445187489 is a deficient number, since it is larger than the sum of its proper divisors (1).

445187489 is an equidigital number, since it uses as much as digits as its factorization.

445187489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1290240, while the sum is 50.

The square root of 445187489 is about 21099.4665572379. The cubic root of 445187489 is about 763.5678784263.

The spelling of 445187489 in words is "four hundred forty-five million, one hundred eighty-seven thousand, four hundred eighty-nine".