243448657 has 2 divisors, whose sum is σ = 243448658. Its totient is φ = 243448656.

The previous prime is 243448651. The next prime is 243448703. The reversal of 243448657 is 756844342.

243448657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240901441 + 2547216 = 15521^2 + 1596^2 .

It is a cyclic number.

It is not a de Polignac number, because 243448657 - 2¹⁹ = 242924369 is a prime.

It is not a weakly prime, because it can be changed into another prime (243448651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121724328 + 121724329.

It is an arithmetic number, because the mean of its divisors is an integer number (121724329).

Almost surely, 2^243448657 is an apocalyptic number.

It is an amenable number.

243448657 is a deficient number, since it is larger than the sum of its proper divisors (1).

243448657 is an equidigital number, since it uses as much as digits as its factorization.

243448657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 43.

The square root of 243448657 is about 15602.8413117611. The cubic root of 243448657 is about 624.4089618945.

It can be divided in two parts, 243 and 448657, that added together give a square (448900 = 670²).

The spelling of 243448657 in words is "two hundred forty-three million, four hundred forty-eight thousand, six hundred fifty-seven".