244309 has 4 divisors (see below), whose sum is σ = 263116. Its totient is φ = 225504.

The previous prime is 244303. The next prime is 244313. The reversal of 244309 is 903442.

244309 is nontrivially palindromic in base 15.

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 103684 + 140625 = 322^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 244309 - 2³ = 244301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 244309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244301) 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, 9384 + ... + 9409.

It is an arithmetic number, because the mean of its divisors is an integer number (65779).

2²⁴⁴³⁰⁹ is an apocalyptic number.

It is an amenable number.

244309 is a deficient number, since it is larger than the sum of its proper divisors (18807).

244309 is a wasteful number, since it uses less digits than its factorization.

244309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18806.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 244309 is about 494.2762385549. The cubic root of 244309 is about 62.5143646982.

The spelling of 244309 in words is "two hundred forty-four thousand, three hundred nine".