806720111 has 2 divisors, whose sum is σ = 806720112. Its totient is φ = 806720110.

The previous prime is 806720087. The next prime is 806720143. The reversal of 806720111 is 111027608.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 806720111 - 2²⁶ = 739611247 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 (806720711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403360055 + 403360056.

It is an arithmetic number, because the mean of its divisors is an integer number (403360056).

Almost surely, 2^806720111 is an apocalyptic number.

806720111 is a deficient number, since it is larger than the sum of its proper divisors (1).

806720111 is an equidigital number, since it uses as much as digits as its factorization.

806720111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 806720111 is about 28402.8187157543. The cubic root of 806720111 is about 930.9098549290.

Adding to 806720111 its reverse (111027608), we get a palindrome (917747719).

The spelling of 806720111 in words is "eight hundred six million, seven hundred twenty thousand, one hundred eleven".