144389491 has 2 divisors, whose sum is σ = 144389492. Its totient is φ = 144389490.

The previous prime is 144389477. The next prime is 144389519. The reversal of 144389491 is 194983441.

It is a weak prime.

It is an emirp because it is prime and its reverse (194983441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144389491 - 2¹⁷ = 144258419 is a prime.

It is a super-2 number, since 2×144389491² = 41696650222478162, which contains 22 as substring.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (144389411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72194745 + 72194746.

It is an arithmetic number, because the mean of its divisors is an integer number (72194746).

Almost surely, 2^144389491 is an apocalyptic number.

144389491 is a deficient number, since it is larger than the sum of its proper divisors (1).

144389491 is an equidigital number, since it uses as much as digits as its factorization.

144389491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 43.

The square root of 144389491 is about 12016.2178325794. The cubic root of 144389491 is about 524.6204252559.

The spelling of 144389491 in words is "one hundred forty-four million, three hundred eighty-nine thousand, four hundred ninety-one".