244443421 has 2 divisors, whose sum is σ = 244443422. Its totient is φ = 244443420.

The previous prime is 244443389. The next prime is 244443449. The reversal of 244443421 is 124344442.

It is an a-pointer prime, because the next prime (244443449) can be obtained adding 244443421 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125328025 + 119115396 = 11195^2 + 10914^2 .

It is a cyclic number.

It is not a de Polignac number, because 244443421 - 2⁵ = 244443389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 244443421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244443461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122221710 + 122221711.

It is an arithmetic number, because the mean of its divisors is an integer number (122221711).

Almost surely, 2^244443421 is an apocalyptic number.

It is an amenable number.

244443421 is a deficient number, since it is larger than the sum of its proper divisors (1).

244443421 is an equidigital number, since it uses as much as digits as its factorization.

244443421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 28.

The square root of 244443421 is about 15634.6864695139. The cubic root of 244443421 is about 625.2582791723.

Adding to 244443421 its reverse (124344442), we get a palindrome (368787863).

The spelling of 244443421 in words is "two hundred forty-four million, four hundred forty-three thousand, four hundred twenty-one".