260781089 has 2 divisors, whose sum is σ = 260781090. Its totient is φ = 260781088.

The previous prime is 260781067. The next prime is 260781151. The reversal of 260781089 is 980187062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195300625 + 65480464 = 13975^2 + 8092^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260781089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (260781029) 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, 130390544 + 130390545.

It is an arithmetic number, because the mean of its divisors is an integer number (130390545).

Almost surely, 2^260781089 is an apocalyptic number.

It is an amenable number.

260781089 is a deficient number, since it is larger than the sum of its proper divisors (1).

260781089 is an equidigital number, since it uses as much as digits as its factorization.

260781089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 260781089 is about 16148.7178748036. The cubic root of 260781089 is about 638.8889324439. Note that the first 3 decimals are identical.

The spelling of 260781089 in words is "two hundred sixty million, seven hundred eighty-one thousand, eighty-nine".