144689 has 4 divisors (see below), whose sum is σ = 148260. Its totient is φ = 141120.

The previous prime is 144671. The next prime is 144701. The reversal of 144689 is 986441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 986441 = 67 ⋅14723.

It can be written as a sum of positive squares in 2 ways, for example, as 10000 + 134689 = 100^2 + 367^2 .

It is a cyclic number.

It is not a de Polignac number, because 144689 - 2¹² = 140593 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (144629) 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, 1724 + ... + 1805.

It is an arithmetic number, because the mean of its divisors is an integer number (37065).

2¹⁴⁴⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

144689 is a deficient number, since it is larger than the sum of its proper divisors (3571).

144689 is an equidigital number, since it uses as much as digits as its factorization.

144689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570.

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

The square root of 144689 is about 380.3800730848. The cubic root of 144689 is about 52.4982917056.

The spelling of 144689 in words is "one hundred forty-four thousand, six hundred eighty-nine".