243422653 has 2 divisors, whose sum is σ = 243422654. Its totient is φ = 243422652.

The previous prime is 243422629. The next prime is 243422657. The reversal of 243422653 is 356224342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138933369 + 104489284 = 11787^2 + 10222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243422653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243422657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121711326 + 121711327.

It is an arithmetic number, because the mean of its divisors is an integer number (121711327).

Almost surely, 2^243422653 is an apocalyptic number.

It is an amenable number.

243422653 is a deficient number, since it is larger than the sum of its proper divisors (1).

243422653 is an equidigital number, since it uses as much as digits as its factorization.

243422653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 31.

The square root of 243422653 is about 15602.0079797441. The cubic root of 243422653 is about 624.3867289947.

Adding to 243422653 its reverse (356224342), we get a palindrome (599646995).

The spelling of 243422653 in words is "two hundred forty-three million, four hundred twenty-two thousand, six hundred fifty-three".