144609389 has 4 divisors (see below), whose sum is σ = 149274240. Its totient is φ = 139944540.

The previous prime is 144609379. The next prime is 144609397. The reversal of 144609389 is 983906441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-144609389 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 (144609329) 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, 2332379 + ... + 2332440.

It is an arithmetic number, because the mean of its divisors is an integer number (37318560).

Almost surely, 2^144609389 is an apocalyptic number.

It is an amenable number.

144609389 is a deficient number, since it is larger than the sum of its proper divisors (4664851).

144609389 is an equidigital number, since it uses as much as digits as its factorization.

144609389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4664850.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 144609389 is about 12025.3644019630. The cubic root of 144609389 is about 524.8866137597.

The spelling of 144609389 in words is "one hundred forty-four million, six hundred nine thousand, three hundred eighty-nine".