1442881189 has 2 divisors, whose sum is σ = 1442881190. Its totient is φ = 1442881188.

The previous prime is 1442881183. The next prime is 1442881199. The reversal of 1442881189 is 9811882441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 856030564 + 586850625 = 29258^2 + 24225^2 .

It is an emirp because it is prime and its reverse (9811882441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1442881189 - 2²³ = 1434492581 is a prime.

It is a super-4 number, since 4×1442881189⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1442881183) 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, 721440594 + 721440595.

It is an arithmetic number, because the mean of its divisors is an integer number (721440595).

Almost surely, 2^1442881189 is an apocalyptic number.

It is an amenable number.

1442881189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1442881189 is an equidigital number, since it uses as much as digits as its factorization.

1442881189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 147456, while the sum is 46.

The square root of 1442881189 is about 37985.2759500310. The cubic root of 1442881189 is about 1129.9958725409.

The spelling of 1442881189 in words is "one billion, four hundred forty-two million, eight hundred eighty-one thousand, one hundred eighty-nine".