12611917 has 2 divisors, whose sum is σ = 12611918. Its totient is φ = 12611916.

The previous prime is 12611903. The next prime is 12611927. The reversal of 12611917 is 71911621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9036036 + 3575881 = 3006^2 + 1891^2 .

It is an emirp because it is prime and its reverse (71911621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12611917 - 2⁷ = 12611789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12611927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6305958 + 6305959.

It is an arithmetic number, because the mean of its divisors is an integer number (6305959).

Almost surely, 2^12611917 is an apocalyptic number.

It is an amenable number.

12611917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12611917 is an equidigital number, since it uses as much as digits as its factorization.

12611917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 28.

The square root of 12611917 is about 3551.3260903499. The cubic root of 12611917 is about 232.7700150423.

The spelling of 12611917 in words is "twelve million, six hundred eleven thousand, nine hundred seventeen".