144617989 has 4 divisors (see below), whose sum is σ = 144706924. Its totient is φ = 144529056.

The previous prime is 144617927. The next prime is 144618011. The reversal of 144617989 is 989716441.

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 100661089 + 43956900 = 10033^2 + 6630^2 .

It is a cyclic number.

It is not a de Polignac number, because 144617989 - 2⁹ = 144617477 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 (144617089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41982 + ... + 45295.

It is an arithmetic number, because the mean of its divisors is an integer number (36176731).

Almost surely, 2^144617989 is an apocalyptic number.

It is an amenable number.

144617989 is a deficient number, since it is larger than the sum of its proper divisors (88935).

144617989 is an equidigital number, since it uses as much as digits as its factorization.

144617989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88934.

The product of its digits is 435456, while the sum is 49.

The square root of 144617989 is about 12025.7219741685. The cubic root of 144617989 is about 524.8970186521.

The spelling of 144617989 in words is "one hundred forty-four million, six hundred seventeen thousand, nine hundred eighty-nine".