244661321 has 2 divisors, whose sum is σ = 244661322. Its totient is φ = 244661320.

The previous prime is 244661293. The next prime is 244661323. The reversal of 244661321 is 123166442.

244661321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236821321 + 7840000 = 15389^2 + 2800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-244661321 is a prime.

It is a Sophie Germain prime.

Together with 244661323, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (244661323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122330660 + 122330661.

It is an arithmetic number, because the mean of its divisors is an integer number (122330661).

Almost surely, 2^244661321 is an apocalyptic number.

It is an amenable number.

244661321 is a deficient number, since it is larger than the sum of its proper divisors (1).

244661321 is an equidigital number, since it uses as much as digits as its factorization.

244661321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 244661321 is about 15641.6533972595. The cubic root of 244661321 is about 625.4440117443. Note that the first 3 decimals are identical.

The spelling of 244661321 in words is "two hundred forty-four million, six hundred sixty-one thousand, three hundred twenty-one".