1889056321 has 2 divisors, whose sum is σ = 1889056322. Its totient is φ = 1889056320.

The previous prime is 1889056319. The next prime is 1889056333. The reversal of 1889056321 is 1236509881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1539777600 + 349278721 = 39240^2 + 18689^2 .

It is an emirp because it is prime and its reverse (1236509881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1889056321 - 2¹ = 1889056319 is a prime.

Together with 1889056319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1889056391) 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, 944528160 + 944528161.

It is an arithmetic number, because the mean of its divisors is an integer number (944528161).

Almost surely, 2^1889056321 is an apocalyptic number.

It is an amenable number.

1889056321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1889056321 is an equidigital number, since it uses as much as digits as its factorization.

1889056321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 1889056321 is about 43463.2755438428. The cubic root of 1889056321 is about 1236.1797794738.

It can be divided in two parts, 188 and 9056321, that added together give a palindrome (9056509).

The spelling of 1889056321 in words is "one billion, eight hundred eighty-nine million, fifty-six thousand, three hundred twenty-one".