813023 has 2 divisors, whose sum is σ = 813024. Its totient is φ = 813022.

The previous prime is 813017. The next prime is 813041. The reversal of 813023 is 320318.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813023 is a prime.

It is a super-2 number, since 2×813023² = 1322012797058, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 812992 and 813010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406511 + 406512.

It is an arithmetic number, because the mean of its divisors is an integer number (406512).

2⁸¹³⁰²³ is an apocalyptic number.

813023 is a deficient number, since it is larger than the sum of its proper divisors (1).

813023 is an equidigital number, since it uses as much as digits as its factorization.

813023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 813023 is about 901.6778803985. The cubic root of 813023 is about 93.3327961987.

It can be divided in two parts, 8 and 13023, that added together give a palindrome (13031).

The spelling of 813023 in words is "eight hundred thirteen thousand, twenty-three".