810923 has 2 divisors, whose sum is σ = 810924. Its totient is φ = 810922.

The previous prime is 810913. The next prime is 810941. The reversal of 810923 is 329018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 810923 - 2⁴ = 810907 is a prime.

It is a super-2 number, since 2×810923² = 1315192223858, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (810913) 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, 405461 + 405462.

It is an arithmetic number, because the mean of its divisors is an integer number (405462).

2⁸¹⁰⁹²³ is an apocalyptic number.

810923 is a deficient number, since it is larger than the sum of its proper divisors (1).

810923 is an equidigital number, since it uses as much as digits as its factorization.

810923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 810923 is about 900.5126317826. The cubic root of 810923 is about 93.2523688445.

The spelling of 810923 in words is "eight hundred ten thousand, nine hundred twenty-three".