115746781 has 2 divisors, whose sum is σ = 115746782. Its totient is φ = 115746780.

The previous prime is 115746739. The next prime is 115746817. The reversal of 115746781 is 187647511.

Together with next prime (115746817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83722500 + 32024281 = 9150^2 + 5659^2 .

It is a cyclic number.

It is not a de Polignac number, because 115746781 - 2⁹ = 115746269 is a prime.

It is a super-2 number, since 2×115746781² = 26794634623723922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115746481) 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, 57873390 + 57873391.

It is an arithmetic number, because the mean of its divisors is an integer number (57873391).

Almost surely, 2^115746781 is an apocalyptic number.

It is an amenable number.

115746781 is a deficient number, since it is larger than the sum of its proper divisors (1).

115746781 is an equidigital number, since it uses as much as digits as its factorization.

115746781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 40.

The square root of 115746781 is about 10758.5677950181. The cubic root of 115746781 is about 487.3447672308.

The spelling of 115746781 in words is "one hundred fifteen million, seven hundred forty-six thousand, seven hundred eighty-one".