811147 has 2 divisors, whose sum is σ = 811148. Its totient is φ = 811146.

The previous prime is 811127. The next prime is 811157. The reversal of 811147 is 741118.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 811147 - 2¹⁹ = 286859 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 811147.

It is not a weakly prime, because it can be changed into another prime (811127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405573 + 405574.

It is an arithmetic number, because the mean of its divisors is an integer number (405574).

2⁸¹¹¹⁴⁷ is an apocalyptic number.

811147 is a deficient number, since it is larger than the sum of its proper divisors (1).

811147 is an equidigital number, since it uses as much as digits as its factorization.

811147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 224, while the sum is 22.

The square root of 811147 is about 900.6369967973. The cubic root of 811147 is about 93.2609543730.

The spelling of 811147 in words is "eight hundred eleven thousand, one hundred forty-seven".