12636791 has 2 divisors, whose sum is σ = 12636792. Its totient is φ = 12636790.

The previous prime is 12636787. The next prime is 12636823. The reversal of 12636791 is 19763621.

12636791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12636791 - 2² = 12636787 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12636731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6318395 + 6318396.

It is an arithmetic number, because the mean of its divisors is an integer number (6318396).

Almost surely, 2^12636791 is an apocalyptic number.

12636791 is a deficient number, since it is larger than the sum of its proper divisors (1).

12636791 is an equidigital number, since it uses as much as digits as its factorization.

12636791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 35.

The square root of 12636791 is about 3554.8264373947. The cubic root of 12636791 is about 232.9229423387.

The spelling of 12636791 in words is "twelve million, six hundred thirty-six thousand, seven hundred ninety-one".