2243997649 has 2 divisors, whose sum is σ = 2243997650. Its totient is φ = 2243997648.

The previous prime is 2243997617. The next prime is 2243997659. The reversal of 2243997649 is 9467993422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2209658049 + 34339600 = 47007^2 + 5860^2 .

It is a cyclic number.

It is not a de Polignac number, because 2243997649 - 2⁵ = 2243997617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2243997649.

It is not a weakly prime, because it can be changed into another prime (2243997659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1121998824 + 1121998825.

It is an arithmetic number, because the mean of its divisors is an integer number (1121998825).

Almost surely, 2^2243997649 is an apocalyptic number.

It is an amenable number.

2243997649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2243997649 is an equidigital number, since it uses as much as digits as its factorization.

2243997649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 55.

The square root of 2243997649 is about 47370.8523144771. The cubic root of 2243997649 is about 1309.2044290497.

The spelling of 2243997649 in words is "two billion, two hundred forty-three million, nine hundred ninety-seven thousand, six hundred forty-nine".