11805709 has 2 divisors, whose sum is σ = 11805710. Its totient is φ = 11805708.

The previous prime is 11805641. The next prime is 11805713. The reversal of 11805709 is 90750811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9132484 + 2673225 = 3022^2 + 1635^2 .

It is a cyclic number.

It is not a de Polignac number, because 11805709 - 2⁹ = 11805197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11805719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5902854 + 5902855.

It is an arithmetic number, because the mean of its divisors is an integer number (5902855).

Almost surely, 2^11805709 is an apocalyptic number.

It is an amenable number.

11805709 is a deficient number, since it is larger than the sum of its proper divisors (1).

11805709 is an equidigital number, since it uses as much as digits as its factorization.

11805709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 11805709 is about 3435.9436840554. The cubic root of 11805709 is about 227.7005211897.

It can be divided in two parts, 1180 and 5709, that added together give a square (6889 = 83²).

The spelling of 11805709 in words is "eleven million, eight hundred five thousand, seven hundred nine".