260039009 has 2 divisors, whose sum is σ = 260039010. Its totient is φ = 260039008.

The previous prime is 260038981. The next prime is 260039023. The reversal of 260039009 is 900930062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193126609 + 66912400 = 13897^2 + 8180^2 .

It is a cyclic number.

It is not a de Polignac number, because 260039009 - 2¹⁶ = 259973473 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (260039099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130019504 + 130019505.

It is an arithmetic number, because the mean of its divisors is an integer number (130019505).

Almost surely, 2^260039009 is an apocalyptic number.

It is an amenable number.

260039009 is a deficient number, since it is larger than the sum of its proper divisors (1).

260039009 is an equidigital number, since it uses as much as digits as its factorization.

260039009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 260039009 is about 16125.7250689698. The cubic root of 260039009 is about 638.2823481757.

The spelling of 260039009 in words is "two hundred sixty million, thirty-nine thousand, nine".