806564243 has 2 divisors, whose sum is σ = 806564244. Its totient is φ = 806564242.

The previous prime is 806564219. The next prime is 806564251. The reversal of 806564243 is 342465608.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 806564243 - 2²⁴ = 789787027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 806564197 and 806564206.

It is not a weakly prime, because it can be changed into another prime (806504243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403282121 + 403282122.

It is an arithmetic number, because the mean of its divisors is an integer number (403282122).

Almost surely, 2^806564243 is an apocalyptic number.

806564243 is a deficient number, since it is larger than the sum of its proper divisors (1).

806564243 is an equidigital number, since it uses as much as digits as its factorization.

806564243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 806564243 is about 28400.0747006060. The cubic root of 806564243 is about 930.8498967514.

The spelling of 806564243 in words is "eight hundred six million, five hundred sixty-four thousand, two hundred forty-three".