812393 has 2 divisors, whose sum is σ = 812394. Its totient is φ = 812392.

The previous prime is 812387. The next prime is 812401. The reversal of 812393 is 393218.

812393 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 can be written as a sum of positive squares in only one way, i.e., 769129 + 43264 = 877^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 812393 - 2⁸ = 812137 is a prime.

It is not a weakly prime, because it can be changed into another prime (812353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406196 + 406197.

It is an arithmetic number, because the mean of its divisors is an integer number (406197).

2⁸¹²³⁹³ is an apocalyptic number.

It is an amenable number.

812393 is a deficient number, since it is larger than the sum of its proper divisors (1).

812393 is an equidigital number, since it uses as much as digits as its factorization.

812393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 812393 is about 901.3284639908. The cubic root of 812393 is about 93.3086825489.

The spelling of 812393 in words is "eight hundred twelve thousand, three hundred ninety-three".