811910923 has 2 divisors, whose sum is σ = 811910924. Its totient is φ = 811910922.

The previous prime is 811910903. The next prime is 811910929. The reversal of 811910923 is 329019118.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 811910923 - 2²⁹ = 275040011 is a prime.

It is not a weakly prime, because it can be changed into another prime (811910929) 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, 405955461 + 405955462.

It is an arithmetic number, because the mean of its divisors is an integer number (405955462).

Almost surely, 2^811910923 is an apocalyptic number.

811910923 is a deficient number, since it is larger than the sum of its proper divisors (1).

811910923 is an equidigital number, since it uses as much as digits as its factorization.

811910923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 811910923 is about 28494.0506597430. The cubic root of 811910923 is about 932.9022232491.

The spelling of 811910923 in words is "eight hundred eleven million, nine hundred ten thousand, nine hundred twenty-three".