806266789 has 2 divisors, whose sum is σ = 806266790. Its totient is φ = 806266788.

The previous prime is 806266781. The next prime is 806266819. The reversal of 806266789 is 987662608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 770062500 + 36204289 = 27750^2 + 6017^2 .

It is a cyclic number.

It is not a de Polignac number, because 806266789 - 2³ = 806266781 is a prime.

It is a super-2 number, since 2×806266789² = 1300132270088741042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806266781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403133394 + 403133395.

It is an arithmetic number, because the mean of its divisors is an integer number (403133395).

Almost surely, 2^806266789 is an apocalyptic number.

It is an amenable number.

806266789 is a deficient number, since it is larger than the sum of its proper divisors (1).

806266789 is an equidigital number, since it uses as much as digits as its factorization.

806266789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 806266789 is about 28394.8373652677. The cubic root of 806266789 is about 930.7354528526.

The spelling of 806266789 in words is "eight hundred six million, two hundred sixty-six thousand, seven hundred eighty-nine".