12117925717 has 2 divisors, whose sum is σ = 12117925718. Its totient is φ = 12117925716.

The previous prime is 12117925691. The next prime is 12117925723. The reversal of 12117925717 is 71752971121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9315917361 + 2802008356 = 96519^2 + 52934^2 .

It is a cyclic number.

It is not a de Polignac number, because 12117925717 - 2¹⁵ = 12117892949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12117925517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6058962858 + 6058962859.

It is an arithmetic number, because the mean of its divisors is an integer number (6058962859).

Almost surely, 2^12117925717 is an apocalyptic number.

It is an amenable number.

12117925717 is a deficient number, since it is larger than the sum of its proper divisors (1).

12117925717 is an equidigital number, since it uses as much as digits as its factorization.

12117925717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61740, while the sum is 43.

The spelling of 12117925717 in words is "twelve billion, one hundred seventeen million, nine hundred twenty-five thousand, seven hundred seventeen".