811716827 has 2 divisors, whose sum is σ = 811716828. Its totient is φ = 811716826.

The previous prime is 811716809. The next prime is 811716869. The reversal of 811716827 is 728617118.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 811716827 - 2²⁰ = 810668251 is a prime.

It is equal to p_41717858 and since 811716827 and 41717858 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (811716887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405858413 + 405858414.

It is an arithmetic number, because the mean of its divisors is an integer number (405858414).

Almost surely, 2^811716827 is an apocalyptic number.

811716827 is a deficient number, since it is larger than the sum of its proper divisors (1).

811716827 is an equidigital number, since it uses as much as digits as its factorization.

811716827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 41.

The square root of 811716827 is about 28490.6445522034. The cubic root of 811716827 is about 932.8278772358.

The spelling of 811716827 in words is "eight hundred eleven million, seven hundred sixteen thousand, eight hundred twenty-seven".