12691711 has 2 divisors, whose sum is σ = 12691712. Its totient is φ = 12691710.

The previous prime is 12691697. The next prime is 12691717. The reversal of 12691711 is 11719621.

It is a strong prime.

It is an emirp because it is prime and its reverse (11719621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12691711 - 2⁷ = 12691583 is a prime.

It is a super-2 number, since 2×12691711² = 322159056215042, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12691711.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12691717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6345855 + 6345856.

It is an arithmetic number, because the mean of its divisors is an integer number (6345856).

Almost surely, 2^12691711 is an apocalyptic number.

12691711 is a deficient number, since it is larger than the sum of its proper divisors (1).

12691711 is an equidigital number, since it uses as much as digits as its factorization.

12691711 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 12691711 is about 3562.5427716731. The cubic root of 12691711 is about 233.2598854996.

The spelling of 12691711 in words is "twelve million, six hundred ninety-one thousand, seven hundred eleven".