2243739989 has 2 divisors, whose sum is σ = 2243739990. Its totient is φ = 2243739988.

The previous prime is 2243739937. The next prime is 2243740033. The reversal of 2243739989 is 9899373422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2185095025 + 58644964 = 46745^2 + 7658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2243739989 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 (2243739919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1121869994 + 1121869995.

It is an arithmetic number, because the mean of its divisors is an integer number (1121869995).

Almost surely, 2^2243739989 is an apocalyptic number.

It is an amenable number.

2243739989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2243739989 is an equidigital number, since it uses as much as digits as its factorization.

2243739989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 56.

The square root of 2243739989 is about 47368.1326315488. The cubic root of 2243739989 is about 1309.1543186993.

It can be divided in two parts, 22437 and 39989, that added together give a palindrome (62426).

The spelling of 2243739989 in words is "two billion, two hundred forty-three million, seven hundred thirty-nine thousand, nine hundred eighty-nine".