12862691 has 2 divisors, whose sum is σ = 12862692. Its totient is φ = 12862690.

The previous prime is 12862679. The next prime is 12862699. The reversal of 12862691 is 19626821.

It is a strong prime.

It is an emirp because it is prime and its reverse (19626821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12862691 - 2⁶ = 12862627 is a prime.

It is a super-2 number, since 2×12862691² = 330897639522962, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12862699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6431345 + 6431346.

It is an arithmetic number, because the mean of its divisors is an integer number (6431346).

Almost surely, 2^12862691 is an apocalyptic number.

12862691 is a deficient number, since it is larger than the sum of its proper divisors (1).

12862691 is an equidigital number, since it uses as much as digits as its factorization.

12862691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 12862691 is about 3586.4593961176. The cubic root of 12862691 is about 234.3026922663.

The spelling of 12862691 in words is "twelve million, eight hundred sixty-two thousand, six hundred ninety-one".