243422749 has 2 divisors, whose sum is σ = 243422750. Its totient is φ = 243422748.

The previous prime is 243422717. The next prime is 243422783. The reversal of 243422749 is 947224342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205205625 + 38217124 = 14325^2 + 6182^2 .

It is a cyclic number.

It is not a de Polignac number, because 243422749 - 2⁵ = 243422717 is a prime.

It is a super-4 number, since 4×243422749⁴ (a number of 35 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (283422749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121711374 + 121711375.

It is an arithmetic number, because the mean of its divisors is an integer number (121711375).

Almost surely, 2^243422749 is an apocalyptic number.

It is an amenable number.

243422749 is a deficient number, since it is larger than the sum of its proper divisors (1).

243422749 is an equidigital number, since it uses as much as digits as its factorization.

243422749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 37.

The square root of 243422749 is about 15602.0110562709. The cubic root of 243422749 is about 624.3868110757.

The spelling of 243422749 in words is "two hundred forty-three million, four hundred twenty-two thousand, seven hundred forty-nine".