243200417 has 2 divisors, whose sum is σ = 243200418. Its totient is φ = 243200416.

The previous prime is 243200393. The next prime is 243200423. The reversal of 243200417 is 714002342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127938721 + 115261696 = 11311^2 + 10736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243200417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243200392 and 243200401.

It is not a weakly prime, because it can be changed into another prime (243200497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121600208 + 121600209.

It is an arithmetic number, because the mean of its divisors is an integer number (121600209).

Almost surely, 2^243200417 is an apocalyptic number.

It is an amenable number.

243200417 is a deficient number, since it is larger than the sum of its proper divisors (1).

243200417 is an equidigital number, since it uses as much as digits as its factorization.

243200417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 243200417 is about 15594.8843214690. The cubic root of 243200417 is about 624.1966570399.

Adding to 243200417 its reverse (714002342), we get a palindrome (957202759).

The spelling of 243200417 in words is "two hundred forty-three million, two hundred thousand, four hundred seventeen".