144918109 has 4 divisors (see below), whose sum is σ = 165620704. Its totient is φ = 124215516.

The previous prime is 144918071. The next prime is 144918131. The reversal of 144918109 is 901819441.

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: 901819441 = 3929 ⋅229529.

It is a cyclic number.

It is not a de Polignac number, because 144918109 - 2¹¹ = 144916061 is a prime.

It is a super-2 number, since 2×144918109² = 42002516632271762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144918139) 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, 10351287 + ... + 10351300.

It is an arithmetic number, because the mean of its divisors is an integer number (41405176).

Almost surely, 2^144918109 is an apocalyptic number.

It is an amenable number.

144918109 is a deficient number, since it is larger than the sum of its proper divisors (20702595).

144918109 is an equidigital number, since it uses as much as digits as its factorization.

144918109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20702594.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 144918109 is about 12038.1937598628. The cubic root of 144918109 is about 525.2598671157.

The spelling of 144918109 in words is "one hundred forty-four million, nine hundred eighteen thousand, one hundred nine".