11768821 has 2 divisors, whose sum is σ = 11768822. Its totient is φ = 11768820.

The previous prime is 11768807. The next prime is 11768831. The reversal of 11768821 is 12886711.

11768821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8346321 + 3422500 = 2889^2 + 1850^2 .

It is an emirp because it is prime and its reverse (12886711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11768821 - 2¹¹ = 11766773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11768831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5884410 + 5884411.

It is an arithmetic number, because the mean of its divisors is an integer number (5884411).

Almost surely, 2^11768821 is an apocalyptic number.

It is an amenable number.

11768821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11768821 is an equidigital number, since it uses as much as digits as its factorization.

11768821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 34.

The square root of 11768821 is about 3430.5715267285. The cubic root of 11768821 is about 227.4631168319.

The spelling of 11768821 in words is "eleven million, seven hundred sixty-eight thousand, eight hundred twenty-one".