259844243 has 2 divisors, whose sum is σ = 259844244. Its totient is φ = 259844242.

The previous prime is 259844203. The next prime is 259844251. The reversal of 259844243 is 342448952.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-259844243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 259844243.

It is not a weakly prime, because it can be changed into another prime (259844203) 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, 129922121 + 129922122.

It is an arithmetic number, because the mean of its divisors is an integer number (129922122).

Almost surely, 2^259844243 is an apocalyptic number.

259844243 is a deficient number, since it is larger than the sum of its proper divisors (1).

259844243 is an equidigital number, since it uses as much as digits as its factorization.

259844243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 41.

The square root of 259844243 is about 16119.6849534971. The cubic root of 259844243 is about 638.1229531806.

The spelling of 259844243 in words is "two hundred fifty-nine million, eight hundred forty-four thousand, two hundred forty-three".