12691807 has 2 divisors, whose sum is σ = 12691808. Its totient is φ = 12691806.

The previous prime is 12691793. The next prime is 12691813. The reversal of 12691807 is 70819621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12691807 - 2²³ = 4303199 is a prime.

It is a super-2 number, since 2×12691807² = 322163929850498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12691907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6345903 + 6345904.

It is an arithmetic number, because the mean of its divisors is an integer number (6345904).

Almost surely, 2^12691807 is an apocalyptic number.

12691807 is a deficient number, since it is larger than the sum of its proper divisors (1).

12691807 is an equidigital number, since it uses as much as digits as its factorization.

12691807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 12691807 is about 3562.5562451700. The cubic root of 12691807 is about 233.2604736234.

The spelling of 12691807 in words is "twelve million, six hundred ninety-one thousand, eight hundred seven".