1280090017 has 2 divisors, whose sum is σ = 1280090018. Its totient is φ = 1280090016.

The previous prime is 1280090011. The next prime is 1280090033. The reversal of 1280090017 is 7100900821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 948886416 + 331203601 = 30804^2 + 18199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1280090017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1280090011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640045008 + 640045009.

It is an arithmetic number, because the mean of its divisors is an integer number (640045009).

Almost surely, 2^1280090017 is an apocalyptic number.

It is an amenable number.

1280090017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280090017 is an equidigital number, since it uses as much as digits as its factorization.

1280090017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1280090017 is about 35778.3456436991. The cubic root of 1280090017 is about 1085.7924985133.

Adding to 1280090017 its reverse (7100900821), we get a palindrome (8380990838).

The spelling of 1280090017 in words is "one billion, two hundred eighty million, ninety thousand, seventeen".