144840989 has 2 divisors, whose sum is σ = 144840990. Its totient is φ = 144840988.

The previous prime is 144840967. The next prime is 144840991. The reversal of 144840989 is 989048441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106956964 + 37884025 = 10342^2 + 6155^2 .

It is a cyclic number.

It is not a de Polignac number, because 144840989 - 2²⁰ = 143792413 is a prime.

Together with 144840991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144840389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72420494 + 72420495.

It is an arithmetic number, because the mean of its divisors is an integer number (72420495).

Almost surely, 2^144840989 is an apocalyptic number.

It is an amenable number.

144840989 is a deficient number, since it is larger than the sum of its proper divisors (1).

144840989 is an equidigital number, since it uses as much as digits as its factorization.

144840989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 144840989 is about 12034.9901952598. The cubic root of 144840989 is about 525.1666760278.

The spelling of 144840989 in words is "one hundred forty-four million, eight hundred forty thousand, nine hundred eighty-nine".