259745609 has 2 divisors, whose sum is σ = 259745610. Its totient is φ = 259745608.

The previous prime is 259745581. The next prime is 259745659. The reversal of 259745609 is 906547952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255904009 + 3841600 = 15997^2 + 1960^2 .

It is a cyclic number.

It is not a de Polignac number, because 259745609 - 2¹⁶ = 259680073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (259745659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129872804 + 129872805.

It is an arithmetic number, because the mean of its divisors is an integer number (129872805).

Almost surely, 2^259745609 is an apocalyptic number.

It is an amenable number.

259745609 is a deficient number, since it is larger than the sum of its proper divisors (1).

259745609 is an equidigital number, since it uses as much as digits as its factorization.

259745609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 47.

The square root of 259745609 is about 16116.6252360722. The cubic root of 259745609 is about 638.0422014910.

The spelling of 259745609 in words is "two hundred fifty-nine million, seven hundred forty-five thousand, six hundred nine".