243328469 has 2 divisors, whose sum is σ = 243328470. Its totient is φ = 243328468.

The previous prime is 243328441. The next prime is 243328487. The reversal of 243328469 is 964823342.

It is a happy number.

243328469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236236900 + 7091569 = 15370^2 + 2663^2 .

It is a cyclic number.

It is not a de Polignac number, because 243328469 - 2¹² = 243324373 is a prime.

It is a super-2 number, since 2×243328469² = 118417487651767922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243328499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121664234 + 121664235.

It is an arithmetic number, because the mean of its divisors is an integer number (121664235).

Almost surely, 2^243328469 is an apocalyptic number.

It is an amenable number.

243328469 is a deficient number, since it is larger than the sum of its proper divisors (1).

243328469 is an equidigital number, since it uses as much as digits as its factorization.

243328469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 41.

The square root of 243328469 is about 15598.9893582886. The cubic root of 243328469 is about 624.3061903033.

The spelling of 243328469 in words is "two hundred forty-three million, three hundred twenty-eight thousand, four hundred sixty-nine".