11745809 has 2 divisors, whose sum is σ = 11745810. Its totient is φ = 11745808.

The previous prime is 11745757. The next prime is 11745821. The reversal of 11745809 is 90854711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9579025 + 2166784 = 3095^2 + 1472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11745809 is a prime.

It is not a weakly prime, because it can be changed into another prime (11745859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5872904 + 5872905.

It is an arithmetic number, because the mean of its divisors is an integer number (5872905).

Almost surely, 2^11745809 is an apocalyptic number.

It is an amenable number.

11745809 is a deficient number, since it is larger than the sum of its proper divisors (1).

11745809 is an equidigital number, since it uses as much as digits as its factorization.

11745809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 11745809 is about 3427.2159254999. The cubic root of 11745809 is about 227.3147644860.

The spelling of 11745809 in words is "eleven million, seven hundred forty-five thousand, eight hundred nine".