11808917 has 2 divisors, whose sum is σ = 11808918. Its totient is φ = 11808916.

The previous prime is 11808871. The next prime is 11808919. The reversal of 11808917 is 71980811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9480241 + 2328676 = 3079^2 + 1526^2 .

It is a cyclic number.

It is not a de Polignac number, because 11808917 - 2¹⁴ = 11792533 is a prime.

Together with 11808919, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11808919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5904458 + 5904459.

It is an arithmetic number, because the mean of its divisors is an integer number (5904459).

Almost surely, 2^11808917 is an apocalyptic number.

It is an amenable number.

11808917 is a deficient number, since it is larger than the sum of its proper divisors (1).

11808917 is an equidigital number, since it uses as much as digits as its factorization.

11808917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 11808917 is about 3436.4104818837. The cubic root of 11808917 is about 227.7211438991.

The spelling of 11808917 in words is "eleven million, eight hundred eight thousand, nine hundred seventeen".