260531009 has 2 divisors, whose sum is σ = 260531010. Its totient is φ = 260531008.

The previous prime is 260530979. The next prime is 260531017. The reversal of 260531009 is 900135062.

260531009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251698225 + 8832784 = 15865^2 + 2972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260531009 is a prime.

It is not a weakly prime, because it can be changed into another prime (260530009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130265504 + 130265505.

It is an arithmetic number, because the mean of its divisors is an integer number (130265505).

Almost surely, 2^260531009 is an apocalyptic number.

It is an amenable number.

260531009 is a deficient number, since it is larger than the sum of its proper divisors (1).

260531009 is an equidigital number, since it uses as much as digits as its factorization.

260531009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 260531009 is about 16140.9729880203. The cubic root of 260531009 is about 638.6846430347.

The spelling of 260531009 in words is "two hundred sixty million, five hundred thirty-one thousand, nine".