144438191 has 4 divisors (see below), whose sum is σ = 147511392. Its totient is φ = 141364992.

The previous prime is 144438169. The next prime is 144438223. The reversal of 144438191 is 191834441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 144438191 - 2⁶ = 144438127 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 (144438391) 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, 1536530 + ... + 1536623.

It is an arithmetic number, because the mean of its divisors is an integer number (36877848).

Almost surely, 2^144438191 is an apocalyptic number.

144438191 is a deficient number, since it is larger than the sum of its proper divisors (3073201).

144438191 is an equidigital number, since it uses as much as digits as its factorization.

144438191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073200.

The product of its digits is 13824, while the sum is 35.

The square root of 144438191 is about 12018.2440897163. The cubic root of 144438191 is about 524.6794003301.

The spelling of 144438191 in words is "one hundred forty-four million, four hundred thirty-eight thousand, one hundred ninety-one".