4243236449 has 2 divisors, whose sum is σ = 4243236450. Its totient is φ = 4243236448.

The previous prime is 4243236379. The next prime is 4243236451. The reversal of 4243236449 is 9446323424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3449800225 + 793436224 = 58735^2 + 28168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4243236449 is a prime.

Together with 4243236451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4243236749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121618224 + 2121618225.

It is an arithmetic number, because the mean of its divisors is an integer number (2121618225).

Almost surely, 2^4243236449 is an apocalyptic number.

It is an amenable number.

4243236449 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243236449 is an equidigital number, since it uses as much as digits as its factorization.

4243236449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 41.

The square root of 4243236449 is about 65140.1293290089. The cubic root of 4243236449 is about 1618.9461785484.

The spelling of 4243236449 in words is "four billion, two hundred forty-three million, two hundred thirty-six thousand, four hundred forty-nine".