12811697 has 2 divisors, whose sum is σ = 12811698. Its totient is φ = 12811696.

The previous prime is 12811691. The next prime is 12811699. The reversal of 12811697 is 79611821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9728161 + 3083536 = 3119^2 + 1756^2 .

It is an emirp because it is prime and its reverse (79611821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12811697 - 2¹² = 12807601 is a prime.

Together with 12811699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12811691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6405848 + 6405849.

It is an arithmetic number, because the mean of its divisors is an integer number (6405849).

Almost surely, 2^12811697 is an apocalyptic number.

It is an amenable number.

12811697 is a deficient number, since it is larger than the sum of its proper divisors (1).

12811697 is an equidigital number, since it uses as much as digits as its factorization.

12811697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 35.

The square root of 12811697 is about 3579.3430961561. The cubic root of 12811697 is about 233.9926520205.

The spelling of 12811697 in words is "twelve million, eight hundred eleven thousand, six hundred ninety-seven".