1445648989 has 2 divisors, whose sum is σ = 1445648990. Its totient is φ = 1445648988.

The previous prime is 1445648977. The next prime is 1445648999. The reversal of 1445648989 is 9898465441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 814132089 + 631516900 = 28533^2 + 25130^2 .

It is a cyclic number.

It is not a de Polignac number, because 1445648989 - 2¹¹ = 1445646941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1445648999) 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, 722824494 + 722824495.

It is an arithmetic number, because the mean of its divisors is an integer number (722824495).

Almost surely, 2^1445648989 is an apocalyptic number.

It is an amenable number.

1445648989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445648989 is an equidigital number, since it uses as much as digits as its factorization.

1445648989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9953280, while the sum is 58.

The square root of 1445648989 is about 38021.6910328828. The cubic root of 1445648989 is about 1130.7179474403.

The spelling of 1445648989 in words is "one billion, four hundred forty-five million, six hundred forty-eight thousand, nine hundred eighty-nine".