144244613 has 4 divisors (see below), whose sum is σ = 145521228. Its totient is φ = 142968000.

The previous prime is 144244577. The next prime is 144244627. The reversal of 144244613 is 316442441.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11142244 + 133102369 = 3338^2 + 11537^2 .

It is a cyclic number.

It is not a de Polignac number, because 144244613 - 2²⁴ = 127467397 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 (144244663) 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, 638138 + ... + 638363.

It is an arithmetic number, because the mean of its divisors is an integer number (36380307).

Almost surely, 2^144244613 is an apocalyptic number.

It is an amenable number.

144244613 is a deficient number, since it is larger than the sum of its proper divisors (1276615).

144244613 is a wasteful number, since it uses less digits than its factorization.

144244613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276614.

The product of its digits is 9216, while the sum is 29.

The square root of 144244613 is about 12010.1878836261. The cubic root of 144244613 is about 524.4449014172. Note that the first 3 decimals are identical.

The spelling of 144244613 in words is "one hundred forty-four million, two hundred forty-four thousand, six hundred thirteen".