812329 has 4 divisors (see below), whose sum is σ = 928384. Its totient is φ = 696276.

The previous prime is 812309. The next prime is 812341. The reversal of 812329 is 923218.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 923218 = 2 ⋅461609.

It is not a de Polignac number, because 812329 - 2⁵ = 812297 is a prime.

It is an Ulam number.

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

It is a Duffinian number.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (812309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58017 + ... + 58030.

It is an arithmetic number, because the mean of its divisors is an integer number (232096).

2⁸¹²³²⁹ is an apocalyptic number.

It is an amenable number.

812329 is a deficient number, since it is larger than the sum of its proper divisors (116055).

812329 is a wasteful number, since it uses less digits than its factorization.

812329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116054.

The product of its digits is 864, while the sum is 25.

The square root of 812329 is about 901.2929601412. The cubic root of 812329 is about 93.3062322108.

Subtracting 812329 from its reverse (923218), we obtain a square (110889 = 333²).

The spelling of 812329 in words is "eight hundred twelve thousand, three hundred twenty-nine".