12108917 has 2 divisors, whose sum is σ = 12108918. Its totient is φ = 12108916.

The previous prime is 12108911. The next prime is 12108931. The reversal of 12108917 is 71980121.

12108917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12103441 + 5476 = 3479^2 + 74^2 .

It is an emirp because it is prime and its reverse (71980121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12108917 - 2⁶ = 12108853 is a prime.

It is a Chen prime.

It is equal to p₇₉₄₇₁₁ and since 12108917 and 794711 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12108917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12108911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6054458 + 6054459.

It is an arithmetic number, because the mean of its divisors is an integer number (6054459).

Almost surely, 2^12108917 is an apocalyptic number.

It is an amenable number.

12108917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12108917 is an equidigital number, since it uses as much as digits as its factorization.

12108917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 12108917 is about 3479.7869187638. The cubic root of 12108917 is about 229.6334236186.

The spelling of 12108917 in words is "twelve million, one hundred eight thousand, nine hundred seventeen".