12008917 has 2 divisors, whose sum is σ = 12008918. Its totient is φ = 12008916.

The previous prime is 12008903. The next prime is 12008939. The reversal of 12008917 is 71980021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11737476 + 271441 = 3426^2 + 521^2 .

It is an emirp because it is prime and its reverse (71980021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12008917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12008417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6004458 + 6004459.

It is an arithmetic number, because the mean of its divisors is an integer number (6004459).

Almost surely, 2^12008917 is an apocalyptic number.

It is an amenable number.

12008917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12008917 is an equidigital number, since it uses as much as digits as its factorization.

12008917 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 28.

The square root of 12008917 is about 3465.3884342163. The cubic root of 12008917 is about 228.9995423419. Note that the first 3 decimals are identical.

Adding to 12008917 its reverse (71980021), we get a palindrome (83988938).

The spelling of 12008917 in words is "twelve million, eight thousand, nine hundred seventeen".