811799 has 2 divisors, whose sum is σ = 811800. Its totient is φ = 811798.

The previous prime is 811777. The next prime is 811819. The reversal of 811799 is 997118.

811799 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811799 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405899 + 405900.

It is an arithmetic number, because the mean of its divisors is an integer number (405900).

2⁸¹¹⁷⁹⁹ is an apocalyptic number.

811799 is a deficient number, since it is larger than the sum of its proper divisors (1).

811799 is an equidigital number, since it uses as much as digits as its factorization.

811799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 35.

The square root of 811799 is about 900.9988901214. The cubic root of 811799 is about 93.2859354009.

The spelling of 811799 in words is "eight hundred eleven thousand, seven hundred ninety-nine".