259206643 has 2 divisors, whose sum is σ = 259206644. Its totient is φ = 259206642.

The previous prime is 259206617. The next prime is 259206671. The reversal of 259206643 is 346602952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 259206643 - 2⁹ = 259206131 is a prime.

It is not a weakly prime, because it can be changed into another prime (259206443) 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, 129603321 + 129603322.

It is an arithmetic number, because the mean of its divisors is an integer number (129603322).

Almost surely, 2^259206643 is an apocalyptic number.

259206643 is a deficient number, since it is larger than the sum of its proper divisors (1).

259206643 is an equidigital number, since it uses as much as digits as its factorization.

259206643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 259206643 is about 16099.8957450041. The cubic root of 259206643 is about 637.6005884082.

The spelling of 259206643 in words is "two hundred fifty-nine million, two hundred six thousand, six hundred forty-three".