144640789 has 2 divisors, whose sum is σ = 144640790. Its totient is φ = 144640788.

The previous prime is 144640757. The next prime is 144640799. The reversal of 144640789 is 987046441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144240100 + 400689 = 12010^2 + 633^2 .

It is a cyclic number.

It is not a de Polignac number, because 144640789 - 2⁵ = 144640757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144640799) 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, 72320394 + 72320395.

It is an arithmetic number, because the mean of its divisors is an integer number (72320395).

Almost surely, 2^144640789 is an apocalyptic number.

It is an amenable number.

144640789 is a deficient number, since it is larger than the sum of its proper divisors (1).

144640789 is an equidigital number, since it uses as much as digits as its factorization.

144640789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 144640789 is about 12026.6699048407. The cubic root of 144640789 is about 524.9246017194.

The spelling of 144640789 in words is "one hundred forty-four million, six hundred forty thousand, seven hundred eighty-nine".