144839481 has 4 divisors (see below), whose sum is σ = 193119312. Its totient is φ = 96559652.

The previous prime is 144839479. The next prime is 144839521. The reversal of 144839481 is 184938441.

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: 184938441 = 3 ⋅61646147.

It is a cyclic number.

It is not a de Polignac number, because 144839481 - 2¹ = 144839479 is a prime.

It is a super-2 number, since 2×144839481² = 41956950512698722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (144839381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24139911 + ... + 24139916.

It is an arithmetic number, because the mean of its divisors is an integer number (48279828).

Almost surely, 2^144839481 is an apocalyptic number.

It is an amenable number.

144839481 is a deficient number, since it is larger than the sum of its proper divisors (48279831).

144839481 is an equidigital number, since it uses as much as digits as its factorization.

144839481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48279830.

The product of its digits is 110592, while the sum is 42.

The square root of 144839481 is about 12034.9275444433. The cubic root of 144839481 is about 525.1648534449.

The spelling of 144839481 in words is "one hundred forty-four million, eight hundred thirty-nine thousand, four hundred eighty-one".