10288781 has 2 divisors, whose sum is σ = 10288782. Its totient is φ = 10288780.

The previous prime is 10288753. The next prime is 10288783. The reversal of 10288781 is 18788201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10023556 + 265225 = 3166^2 + 515^2 .

It is a cyclic number.

It is not a de Polignac number, because 10288781 - 2¹⁰ = 10287757 is a prime.

It is a super-2 number, since 2×10288781² = 211718028931922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 10288783, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10288783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5144390 + 5144391.

It is an arithmetic number, because the mean of its divisors is an integer number (5144391).

Almost surely, 2^10288781 is an apocalyptic number.

It is an amenable number.

10288781 is a deficient number, since it is larger than the sum of its proper divisors (1).

10288781 is an equidigital number, since it uses as much as digits as its factorization.

10288781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 10288781 is about 3207.6129754071. The cubic root of 10288781 is about 217.4976861515.

The spelling of 10288781 in words is "ten million, two hundred eighty-eight thousand, seven hundred eighty-one".