823134321 has 12 divisors (see below), whose sum is σ = 1251549520. Its totient is φ = 519874200.

The previous prime is 823134307. The next prime is 823134331. The reversal of 823134321 is 123431328.

It is not a de Polignac number, because 823134321 - 2¹⁷ = 823003249 is a prime.

It is a super-2 number, since 2×823134321² = 1355100220816262082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (823134331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2406655 + ... + 2406996.

Almost surely, 2^823134321 is an apocalyptic number.

It is an amenable number.

823134321 is a deficient number, since it is larger than the sum of its proper divisors (428415199).

823134321 is a wasteful number, since it uses less digits than its factorization.

823134321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4813676 (or 4813673 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 823134321 is about 28690.3175479115. The cubic root of 823134321 is about 937.1812044597.

Adding to 823134321 its reverse (123431328), we get a palindrome (946565649).

The spelling of 823134321 in words is "eight hundred twenty-three million, one hundred thirty-four thousand, three hundred twenty-one".