243200497 has 2 divisors, whose sum is σ = 243200498. Its totient is φ = 243200496.

The previous prime is 243200443. The next prime is 243200501. The reversal of 243200497 is 794002342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237129201 + 6071296 = 15399^2 + 2464^2 .

It is a cyclic number.

It is not a de Polignac number, because 243200497 - 2¹⁹ = 242676209 is a prime.

It is not a weakly prime, because it can be changed into another prime (243200417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121600248 + 121600249.

It is an arithmetic number, because the mean of its divisors is an integer number (121600249).

Almost surely, 2^243200497 is an apocalyptic number.

It is an amenable number.

243200497 is a deficient number, since it is larger than the sum of its proper divisors (1).

243200497 is an equidigital number, since it uses as much as digits as its factorization.

243200497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 243200497 is about 15594.8868864125. The cubic root of 243200497 is about 624.1967254824.

It can be divided in two parts, 24 and 3200497, that added together give a square (3200521 = 1789²).

The spelling of 243200497 in words is "two hundred forty-three million, two hundred thousand, four hundred ninety-seven".