9340305781 has 2 divisors, whose sum is σ = 9340305782. Its totient is φ = 9340305780.

The previous prime is 9340305769. The next prime is 9340305827. The reversal of 9340305781 is 1875030439.

9340305781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6696803556 + 2643502225 = 81834^2 + 51415^2 .

It is a cyclic number.

It is not a de Polignac number, because 9340305781 - 2⁹ = 9340305269 is a prime.

It is a super-2 number, since 2×9340305781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9340305721) 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, 4670152890 + 4670152891.

It is an arithmetic number, because the mean of its divisors is an integer number (4670152891).

Almost surely, 2^9340305781 is an apocalyptic number.

It is an amenable number.

9340305781 is a deficient number, since it is larger than the sum of its proper divisors (1).

9340305781 is an equidigital number, since it uses as much as digits as its factorization.

9340305781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 9340305781 is about 96645.2574159746. The cubic root of 9340305781 is about 2105.9773602248.

The spelling of 9340305781 in words is "nine billion, three hundred forty million, three hundred five thousand, seven hundred eighty-one".