823409233 has 2 divisors, whose sum is σ = 823409234. Its totient is φ = 823409232.

The previous prime is 823409231. The next prime is 823409261. The reversal of 823409233 is 332904328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 821854224 + 1555009 = 28668^2 + 1247^2 .

It is a cyclic number.

It is not a de Polignac number, because 823409233 - 2¹ = 823409231 is a prime.

Together with 823409231, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (823409231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411704616 + 411704617.

It is an arithmetic number, because the mean of its divisors is an integer number (411704617).

Almost surely, 2^823409233 is an apocalyptic number.

It is an amenable number.

823409233 is a deficient number, since it is larger than the sum of its proper divisors (1).

823409233 is an equidigital number, since it uses as much as digits as its factorization.

823409233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 823409233 is about 28695.1081719515. The cubic root of 823409233 is about 937.2855267132.

The spelling of 823409233 in words is "eight hundred twenty-three million, four hundred nine thousand, two hundred thirty-three".