144239989 has 2 divisors, whose sum is σ = 144239990. Its totient is φ = 144239988.

The previous prime is 144239971. The next prime is 144240007. The reversal of 144239989 is 989932441.

It is a balanced prime because it is at equal distance from previous prime (144239971) and next prime (144240007).

It can be written as a sum of positive squares in only one way, i.e., 141491025 + 2748964 = 11895^2 + 1658^2 .

It is a cyclic number.

It is not a de Polignac number, because 144239989 - 2⁵ = 144239957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144239789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72119994 + 72119995.

It is an arithmetic number, because the mean of its divisors is an integer number (72119995).

Almost surely, 2^144239989 is an apocalyptic number.

It is an amenable number.

144239989 is a deficient number, since it is larger than the sum of its proper divisors (1).

144239989 is an equidigital number, since it uses as much as digits as its factorization.

144239989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 49.

The square root of 144239989 is about 12009.9953788501. The cubic root of 144239989 is about 524.4392973739.

The spelling of 144239989 in words is "one hundred forty-four million, two hundred thirty-nine thousand, nine hundred eighty-nine".