11730781 has 2 divisors, whose sum is σ = 11730782. Its totient is φ = 11730780.

The previous prime is 11730749. The next prime is 11730811. The reversal of 11730781 is 18703711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10208025 + 1522756 = 3195^2 + 1234^2 .

It is a cyclic number.

It is not a de Polignac number, because 11730781 - 2⁵ = 11730749 is a prime.

It is a super-2 number, since 2×11730781² = 275222445739922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11730721) 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, 5865390 + 5865391.

It is an arithmetic number, because the mean of its divisors is an integer number (5865391).

Almost surely, 2^11730781 is an apocalyptic number.

It is an amenable number.

11730781 is a deficient number, since it is larger than the sum of its proper divisors (1).

11730781 is an equidigital number, since it uses as much as digits as its factorization.

11730781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 28.

The square root of 11730781 is about 3425.0227736469. The cubic root of 11730781 is about 227.2177782842.

The spelling of 11730781 in words is "eleven million, seven hundred thirty thousand, seven hundred eighty-one".