12005807917 has 2 divisors, whose sum is σ = 12005807918. Its totient is φ = 12005807916.

The previous prime is 12005807911. The next prime is 12005807923. The reversal of 12005807917 is 71970850021.

It is a balanced prime because it is at equal distance from previous prime (12005807911) and next prime (12005807923).

It can be written as a sum of positive squares in only one way, i.e., 11833305961 + 172501956 = 108781^2 + 13134^2 .

It is a cyclic number.

It is not a de Polignac number, because 12005807917 - 2³ = 12005807909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12005807917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12005807911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6002903958 + 6002903959.

It is an arithmetic number, because the mean of its divisors is an integer number (6002903959).

Almost surely, 2^12005807917 is an apocalyptic number.

It is an amenable number.

12005807917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12005807917 is an equidigital number, since it uses as much as digits as its factorization.

12005807917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 40.

The spelling of 12005807917 in words is "twelve billion, five million, eight hundred seven thousand, nine hundred seventeen".