1130986781 has 2 divisors, whose sum is σ = 1130986782. Its totient is φ = 1130986780.

The previous prime is 1130986771. The next prime is 1130986819. The reversal of 1130986781 is 1876890311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 959140900 + 171845881 = 30970^2 + 13109^2 .

It is an emirp because it is prime and its reverse (1876890311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1130986781 - 2²⁶ = 1063877917 is a prime.

It is a super-2 number, since 2×1130986781² = 2558262197593483922, which contains 22 as substring.

It is a Sophie Germain 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 (1130986711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565493390 + 565493391.

It is an arithmetic number, because the mean of its divisors is an integer number (565493391).

Almost surely, 2^1130986781 is an apocalyptic number.

It is an amenable number.

1130986781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1130986781 is an equidigital number, since it uses as much as digits as its factorization.

1130986781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 1130986781 is about 33630.1469072022. The cubic root of 1130986781 is about 1041.8835384125.

The spelling of 1130986781 in words is "one billion, one hundred thirty million, nine hundred eighty-six thousand, seven hundred eighty-one".