1445623489 has 2 divisors, whose sum is σ = 1445623490. Its totient is φ = 1445623488.

The previous prime is 1445623481. The next prime is 1445623499. The reversal of 1445623489 is 9843265441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1159743025 + 285880464 = 34055^2 + 16908^2 .

It is an emirp because it is prime and its reverse (9843265441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1445623489 - 2³ = 1445623481 is a prime.

It is not a weakly prime, because it can be changed into another prime (1445623481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722811744 + 722811745.

It is an arithmetic number, because the mean of its divisors is an integer number (722811745).

Almost surely, 2^1445623489 is an apocalyptic number.

It is an amenable number.

1445623489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445623489 is an equidigital number, since it uses as much as digits as its factorization.

1445623489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 46.

The square root of 1445623489 is about 38021.3556965030. The cubic root of 1445623489 is about 1130.7112991051.

The spelling of 1445623489 in words is "one billion, four hundred forty-five million, six hundred twenty-three thousand, four hundred eighty-nine".