1444666889 has 2 divisors, whose sum is σ = 1444666890. Its totient is φ = 1444666888.

The previous prime is 1444666877. The next prime is 1444666901. The reversal of 1444666889 is 9886664441.

It is a balanced prime because it is at equal distance from previous prime (1444666877) and next prime (1444666901).

It can be written as a sum of positive squares in only one way, i.e., 795691264 + 648975625 = 28208^2 + 25475^2 .

It is an emirp because it is prime and its reverse (9886664441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1444666889 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (1444666819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722333444 + 722333445.

It is an arithmetic number, because the mean of its divisors is an integer number (722333445).

Almost surely, 2^1444666889 is an apocalyptic number.

It is an amenable number.

1444666889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444666889 is an equidigital number, since it uses as much as digits as its factorization.

1444666889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7962624, while the sum is 56.

The square root of 1444666889 is about 38008.7738423643. The cubic root of 1444666889 is about 1130.4618387844.

The spelling of 1444666889 in words is "one billion, four hundred forty-four million, six hundred sixty-six thousand, eight hundred eighty-nine".