259521289 has 2 divisors, whose sum is σ = 259521290. Its totient is φ = 259521288.

The previous prime is 259521287. The next prime is 259521307. The reversal of 259521289 is 982125952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227406400 + 32114889 = 15080^2 + 5667^2 .

It is a cyclic number.

It is not a de Polignac number, because 259521289 - 2¹ = 259521287 is a prime.

Together with 259521287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (259521287) 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, 129760644 + 129760645.

It is an arithmetic number, because the mean of its divisors is an integer number (129760645).

Almost surely, 2^259521289 is an apocalyptic number.

It is an amenable number.

259521289 is a deficient number, since it is larger than the sum of its proper divisors (1).

259521289 is an equidigital number, since it uses as much as digits as its factorization.

259521289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 43.

The square root of 259521289 is about 16109.6644595721. The cubic root of 259521289 is about 637.8584744863.

The spelling of 259521289 in words is "two hundred fifty-nine million, five hundred twenty-one thousand, two hundred eighty-nine".