806885389 has 2 divisors, whose sum is σ = 806885390. Its totient is φ = 806885388.

The previous prime is 806885363. The next prime is 806885423. The reversal of 806885389 is 983588608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 680322889 + 126562500 = 26083^2 + 11250^2 .

It is a cyclic number.

It is not a de Polignac number, because 806885389 - 2⁹ = 806884877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806385389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403442694 + 403442695.

It is an arithmetic number, because the mean of its divisors is an integer number (403442695).

Almost surely, 2^806885389 is an apocalyptic number.

It is an amenable number.

806885389 is a deficient number, since it is larger than the sum of its proper divisors (1).

806885389 is an equidigital number, since it uses as much as digits as its factorization.

806885389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3317760, while the sum is 55.

The square root of 806885389 is about 28405.7281019163. The cubic root of 806885389 is about 930.9734244417.

The spelling of 806885389 in words is "eight hundred six million, eight hundred eighty-five thousand, three hundred eighty-nine".