12009791 has 2 divisors, whose sum is σ = 12009792. Its totient is φ = 12009790.

The previous prime is 12009779. The next prime is 12009821. The reversal of 12009791 is 19790021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12009791 - 2⁶ = 12009727 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12009091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6004895 + 6004896.

It is an arithmetic number, because the mean of its divisors is an integer number (6004896).

Almost surely, 2^12009791 is an apocalyptic number.

12009791 is a deficient number, since it is larger than the sum of its proper divisors (1).

12009791 is an equidigital number, since it uses as much as digits as its factorization.

12009791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 12009791 is about 3465.5145361115. The cubic root of 12009791 is about 229.0050976790.

The spelling of 12009791 in words is "twelve million, nine thousand, seven hundred ninety-one".