144128989 has 2 divisors, whose sum is σ = 144128990. Its totient is φ = 144128988.

The previous prime is 144128977. The next prime is 144129049. The reversal of 144128989 is 989821441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104652900 + 39476089 = 10230^2 + 6283^2 .

It is a cyclic number.

It is not a de Polignac number, because 144128989 - 2²¹ = 142031837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144128939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72064494 + 72064495.

It is an arithmetic number, because the mean of its divisors is an integer number (72064495).

Almost surely, 2^144128989 is an apocalyptic number.

It is an amenable number.

144128989 is a deficient number, since it is larger than the sum of its proper divisors (1).

144128989 is an equidigital number, since it uses as much as digits as its factorization.

144128989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 46.

The square root of 144128989 is about 12005.3733386347. The cubic root of 144128989 is about 524.3047352890.

The spelling of 144128989 in words is "one hundred forty-four million, one hundred twenty-eight thousand, nine hundred eighty-nine".