12931717 has 4 divisors (see below), whose sum is σ = 12953836. Its totient is φ = 12909600.

The previous prime is 12931669. The next prime is 12931739. The reversal of 12931717 is 71713921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71713921 = 467 ⋅153563.

It can be written as a sum of positive squares in 2 ways, for example, as 7918596 + 5013121 = 2814^2 + 2239^2 .

It is a cyclic number.

It is not a de Polignac number, because 12931717 - 2¹⁹ = 12407429 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12931757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10158 + ... + 11359.

It is an arithmetic number, because the mean of its divisors is an integer number (3238459).

Almost surely, 2^12931717 is an apocalyptic number.

It is an amenable number.

12931717 is a deficient number, since it is larger than the sum of its proper divisors (22119).

12931717 is an equidigital number, since it uses as much as digits as its factorization.

12931717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22118.

The product of its digits is 2646, while the sum is 31.

The square root of 12931717 is about 3596.0696600594. The cubic root of 12931717 is about 234.7210633391.

The spelling of 12931717 in words is "twelve million, nine hundred thirty-one thousand, seven hundred seventeen".