144320189 has 16 divisors (see below), whose sum is σ = 158103792. Its totient is φ = 130940928.

The previous prime is 144320171. The next prime is 144320207. The reversal of 144320189 is 981023441.

It is a happy number.

144320189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (144320171) and next prime (144320207).

It can be written as a sum of positive squares in 8 ways, for example, as 12460900 + 131859289 = 3530^2 + 11483^2 .

It is a cyclic number.

It is not a de Polignac number, because 144320189 - 2²⁰ = 143271613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144380189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243077 + ... + 243669.

It is an arithmetic number, because the mean of its divisors is an integer number (9881487).

Almost surely, 2^144320189 is an apocalyptic number.

It is an amenable number.

144320189 is a deficient number, since it is larger than the sum of its proper divisors (13783603).

144320189 is a wasteful number, since it uses less digits than its factorization.

144320189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 144320189 is about 12013.3338004069. Note that the first 3 decimals coincide. The cubic root of 144320189 is about 524.5364785578.

The spelling of 144320189 in words is "one hundred forty-four million, three hundred twenty thousand, one hundred eighty-nine".