243630449 has 2 divisors, whose sum is σ = 243630450. Its totient is φ = 243630448.

The previous prime is 243630433. The next prime is 243630461. The reversal of 243630449 is 944036342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183412849 + 60217600 = 13543^2 + 7760^2 .

It is a cyclic number.

It is not a de Polignac number, because 243630449 - 2⁴ = 243630433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243630649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121815224 + 121815225.

It is an arithmetic number, because the mean of its divisors is an integer number (121815225).

Almost surely, 2^243630449 is an apocalyptic number.

It is an amenable number.

243630449 is a deficient number, since it is larger than the sum of its proper divisors (1).

243630449 is an equidigital number, since it uses as much as digits as its factorization.

243630449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 243630449 is about 15608.6658302367. The cubic root of 243630449 is about 624.5643462131.

The spelling of 243630449 in words is "two hundred forty-three million, six hundred thirty thousand, four hundred forty-nine".