800065811 has 2 divisors, whose sum is σ = 800065812. Its totient is φ = 800065810.

The previous prime is 800065753. The next prime is 800065829. The reversal of 800065811 is 118560008.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800065811 is a prime.

It is not a weakly prime, because it can be changed into another prime (800065831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400032905 + 400032906.

It is an arithmetic number, because the mean of its divisors is an integer number (400032906).

Almost surely, 2^800065811 is an apocalyptic number.

800065811 is a deficient number, since it is larger than the sum of its proper divisors (1).

800065811 is an equidigital number, since it uses as much as digits as its factorization.

800065811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 800065811 is about 28285.4346086462. The cubic root of 800065811 is about 928.3432216581.

The spelling of 800065811 in words is "eight hundred million, sixty-five thousand, eight hundred eleven".