2243742643 has 2 divisors, whose sum is σ = 2243742644. Its totient is φ = 2243742642.

The previous prime is 2243742619. The next prime is 2243742647. The reversal of 2243742643 is 3462473422.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2243742643 is a prime.

It is not a weakly prime, because it can be changed into another prime (2243742647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1121871321 + 1121871322.

It is an arithmetic number, because the mean of its divisors is an integer number (1121871322).

Almost surely, 2^2243742643 is an apocalyptic number.

2243742643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2243742643 is an equidigital number, since it uses as much as digits as its factorization.

2243742643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 37.

The square root of 2243742643 is about 47368.1606461556. The cubic root of 2243742643 is about 1309.1548348753.

The spelling of 2243742643 in words is "two billion, two hundred forty-three million, seven hundred forty-two thousand, six hundred forty-three".