864811 has 2 divisors, whose sum is σ = 864812. Its totient is φ = 864810.

The previous prime is 864803. The next prime is 864817. The reversal of 864811 is 118468.

864811 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 not a de Polignac number, because 864811 - 2³ = 864803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864811.

It is not a weakly prime, because it can be changed into another prime (864817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432405 + 432406.

It is an arithmetic number, because the mean of its divisors is an integer number (432406).

2⁸⁶⁴⁸¹¹ is an apocalyptic number.

864811 is a deficient number, since it is larger than the sum of its proper divisors (1).

864811 is an equidigital number, since it uses as much as digits as its factorization.

864811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 28.

The square root of 864811 is about 929.9521493066. The cubic root of 864811 is about 95.2738543139.

The spelling of 864811 in words is "eight hundred sixty-four thousand, eight hundred eleven".