812347 has 2 divisors, whose sum is σ = 812348. Its totient is φ = 812346.

The previous prime is 812341. The next prime is 812351. The reversal of 812347 is 743218.

It is a strong prime.

812347 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 812347 - 2¹⁵ = 779579 is a prime.

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 (812341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406173 + 406174.

It is an arithmetic number, because the mean of its divisors is an integer number (406174).

2⁸¹²³⁴⁷ is an apocalyptic number.

812347 is a deficient number, since it is larger than the sum of its proper divisors (1).

812347 is an equidigital number, since it uses as much as digits as its factorization.

812347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 25.

The square root of 812347 is about 901.3029457402. The cubic root of 812347 is about 93.3069213814.

The spelling of 812347 in words is "eight hundred twelve thousand, three hundred forty-seven".