259660069 has 2 divisors, whose sum is σ = 259660070. Its totient is φ = 259660068.

The previous prime is 259660067. The next prime is 259660109. The reversal of 259660069 is 960066952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250430625 + 9229444 = 15825^2 + 3038^2 .

It is a cyclic number.

It is not a de Polignac number, because 259660069 - 2¹ = 259660067 is a prime.

It is a super-2 number, since 2×259660069² = 134846702866169522, which contains 22 as substring.

Together with 259660067, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (259660067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129830034 + 129830035.

It is an arithmetic number, because the mean of its divisors is an integer number (129830035).

Almost surely, 2^259660069 is an apocalyptic number.

It is an amenable number.

259660069 is a deficient number, since it is larger than the sum of its proper divisors (1).

259660069 is an equidigital number, since it uses as much as digits as its factorization.

259660069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 259660069 is about 16113.9712361665. The cubic root of 259660069 is about 637.9721533101.

The spelling of 259660069 in words is "two hundred fifty-nine million, six hundred sixty thousand, sixty-nine".