806306689 has 2 divisors, whose sum is σ = 806306690. Its totient is φ = 806306688.

The previous prime is 806306671. The next prime is 806306693. The reversal of 806306689 is 986603608.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 685130625 + 121176064 = 26175^2 + 11008^2 .

It is a cyclic number.

It is not a de Polignac number, because 806306689 - 2²³ = 797918081 is a prime.

It is a super-2 number, since 2×806306689² = 1300260953452285442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (806306639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403153344 + 403153345.

It is an arithmetic number, because the mean of its divisors is an integer number (403153345).

Almost surely, 2^806306689 is an apocalyptic number.

It is an amenable number.

806306689 is a deficient number, since it is larger than the sum of its proper divisors (1).

806306689 is an equidigital number, since it uses as much as digits as its factorization.

806306689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 806306689 is about 28395.5399490836. The cubic root of 806306689 is about 930.7508058071.

The spelling of 806306689 in words is "eight hundred six million, three hundred six thousand, six hundred eighty-nine".