243028417 has 2 divisors, whose sum is σ = 243028418. Its totient is φ = 243028416.

The previous prime is 243028403. The next prime is 243028421. The reversal of 243028417 is 714820342.

243028417 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., 242238096 + 790321 = 15564^2 + 889^2 .

It is a cyclic number.

It is not a de Polignac number, because 243028417 - 2²³ = 234639809 is a prime.

It is a super-2 number, since 2×243028417² = 118125622939051778, which contains 22 as substring.

It is equal to p_13318357 and since 243028417 and 13318357 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (243028817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121514208 + 121514209.

It is an arithmetic number, because the mean of its divisors is an integer number (121514209).

Almost surely, 2^243028417 is an apocalyptic number.

It is an amenable number.

243028417 is a deficient number, since it is larger than the sum of its proper divisors (1).

243028417 is an equidigital number, since it uses as much as digits as its factorization.

243028417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 243028417 is about 15589.3687171739. The cubic root of 243028417 is about 624.0494709641.

Adding to 243028417 its reverse (714820342), we get a palindrome (957848759).

The spelling of 243028417 in words is "two hundred forty-three million, twenty-eight thousand, four hundred seventeen".