11807909 has 2 divisors, whose sum is σ = 11807910. Its totient is φ = 11807908.

The previous prime is 11807899. The next prime is 11807941. The reversal of 11807909 is 90970811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11730625 + 77284 = 3425^2 + 278^2 .

It is an emirp because it is prime and its reverse (90970811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11807909 - 2¹⁶ = 11742373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₇₇₆₂₇₆ and since 11807909 and 776276 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11807989) 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, 5903954 + 5903955.

It is an arithmetic number, because the mean of its divisors is an integer number (5903955).

Almost surely, 2^11807909 is an apocalyptic number.

It is an amenable number.

11807909 is a deficient number, since it is larger than the sum of its proper divisors (1).

11807909 is an equidigital number, since it uses as much as digits as its factorization.

11807909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 11807909 is about 3436.2638140865. The cubic root of 11807909 is about 227.7146643479.

The spelling of 11807909 in words is "eleven million, eight hundred seven thousand, nine hundred nine".