144493189 has 4 divisors (see below), whose sum is σ = 144519424. Its totient is φ = 144466956.

The previous prime is 144493171. The next prime is 144493247. The reversal of 144493189 is 981394441.

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, and also an emirpimes, since its reverse is a distinct semiprime: 981394441 = 19 ⋅51652339.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144493189 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 (144493159) 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, 1317 + ... + 17050.

It is an arithmetic number, because the mean of its divisors is an integer number (36129856).

Almost surely, 2^144493189 is an apocalyptic number.

It is an amenable number.

144493189 is a deficient number, since it is larger than the sum of its proper divisors (26235).

144493189 is an equidigital number, since it uses as much as digits as its factorization.

144493189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26234.

The product of its digits is 124416, while the sum is 43.

The square root of 144493189 is about 12020.5319765807. The cubic root of 144493189 is about 524.7459862648.

The spelling of 144493189 in words is "one hundred forty-four million, four hundred ninety-three thousand, one hundred eighty-nine".