144890189 has 4 divisors (see below), whose sum is σ = 147265500. Its totient is φ = 142514880.

The previous prime is 144890173. The next prime is 144890209. The reversal of 144890189 is 981098441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54316900 + 90573289 = 7370^2 + 9517^2 .

It is a cyclic number.

It is not a de Polignac number, because 144890189 - 2⁴ = 144890173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144890129) 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 in 3 ways as a sum of consecutive naturals, for example, 1187564 + ... + 1187685.

It is an arithmetic number, because the mean of its divisors is an integer number (36816375).

Almost surely, 2^144890189 is an apocalyptic number.

It is an amenable number.

144890189 is a deficient number, since it is larger than the sum of its proper divisors (2375311).

144890189 is an equidigital number, since it uses as much as digits as its factorization.

144890189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375310.

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 144890189 is about 12037.0340615951. The cubic root of 144890189 is about 525.2261326673.

The spelling of 144890189 in words is "one hundred forty-four million, eight hundred ninety thousand, one hundred eighty-nine".