810023 has 2 divisors, whose sum is σ = 810024. Its totient is φ = 810022.

The previous prime is 810013. The next prime is 810049. The reversal of 810023 is 320018.

810023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-810023 is a prime.

It is a super-2 number, since 2×810023² = 1312274521058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (810013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405011 + 405012.

It is an arithmetic number, because the mean of its divisors is an integer number (405012).

2⁸¹⁰⁰²³ is an apocalyptic number.

810023 is a deficient number, since it is larger than the sum of its proper divisors (1).

810023 is an equidigital number, since it uses as much as digits as its factorization.

810023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 810023 is about 900.0127776871. The cubic root of 810023 is about 93.2178574709.

The spelling of 810023 in words is "eight hundred ten thousand, twenty-three".