823134331 has 2 divisors, whose sum is σ = 823134332. Its totient is φ = 823134330.

The previous prime is 823134307. The next prime is 823134341. The reversal of 823134331 is 133431328.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 823134331 - 2⁹ = 823133819 is a prime.

It is a super-2 number, since 2×823134331² = 1355100253741635122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 823134331.

It is not a weakly prime, because it can be changed into another prime (823134341) 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, 411567165 + 411567166.

It is an arithmetic number, because the mean of its divisors is an integer number (411567166).

Almost surely, 2^823134331 is an apocalyptic number.

823134331 is a deficient number, since it is larger than the sum of its proper divisors (1).

823134331 is an equidigital number, since it uses as much as digits as its factorization.

823134331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 28.

The square root of 823134331 is about 28690.3177221863. The cubic root of 823134331 is about 937.1812082548.

Adding to 823134331 its reverse (133431328), we get a palindrome (956565659).

The spelling of 823134331 in words is "eight hundred twenty-three million, one hundred thirty-four thousand, three hundred thirty-one".