244143989 has 2 divisors, whose sum is σ = 244143990. Its totient is φ = 244143988.

The previous prime is 244143983. The next prime is 244144009. The reversal of 244143989 is 989341442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244140625 + 3364 = 15625^2 + 58^2 .

It is a cyclic number.

It is not a de Polignac number, because 244143989 - 2⁴ = 244143973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244143983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122071994 + 122071995.

It is an arithmetic number, because the mean of its divisors is an integer number (122071995).

Almost surely, 2^244143989 is an apocalyptic number.

It is an amenable number.

244143989 is a deficient number, since it is larger than the sum of its proper divisors (1).

244143989 is an equidigital number, since it uses as much as digits as its factorization.

244143989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 44.

The square root of 244143989 is about 15625.1076476292. The cubic root of 244143989 is about 625.0028706001.

The spelling of 244143989 in words is "two hundred forty-four million, one hundred forty-three thousand, nine hundred eighty-nine".