260009 has 2 divisors, whose sum is σ = 260010. Its totient is φ = 260008.

The previous prime is 260003. The next prime is 260011. The reversal of 260009 is 900062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157609 + 102400 = 397^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 260009 - 2⁴ = 259993 is a prime.

It is a Sophie Germain prime.

Together with 260011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 260009.

It is not a weakly prime, because it can be changed into another prime (260003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130004 + 130005.

It is an arithmetic number, because the mean of its divisors is an integer number (130005).

2²⁶⁰⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

260009 is a deficient number, since it is larger than the sum of its proper divisors (1).

260009 is an equidigital number, since it uses as much as digits as its factorization.

260009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 260009 is about 509.9107765090. The cubic root of 260009 is about 63.8257794229.

The spelling of 260009 in words is "two hundred sixty thousand, nine".