1944382109 has 2 divisors, whose sum is σ = 1944382110. Its totient is φ = 1944382108.

The previous prime is 1944382087. The next prime is 1944382147. The reversal of 1944382109 is 9012834491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1668722500 + 275659609 = 40850^2 + 16603^2 .

It is an emirp because it is prime and its reverse (9012834491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1944382109 - 2¹⁶ = 1944316573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1944382159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972191054 + 972191055.

It is an arithmetic number, because the mean of its divisors is an integer number (972191055).

Almost surely, 2^1944382109 is an apocalyptic number.

It is an amenable number.

1944382109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1944382109 is an equidigital number, since it uses as much as digits as its factorization.

1944382109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1944382109 is about 44095.1483612426. The cubic root of 1944382109 is about 1248.1320599504.

It can be divided in two parts, 1944382 and 109, that added together give a palindrome (1944491).

The spelling of 1944382109 in words is "one billion, nine hundred forty-four million, three hundred eighty-two thousand, one hundred nine".