823825459 has 2 divisors, whose sum is σ = 823825460. Its totient is φ = 823825458.

The previous prime is 823825451. The next prime is 823825487. The reversal of 823825459 is 954528328.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 823825459 - 2³ = 823825451 is a prime.

It is not a weakly prime, because it can be changed into another prime (823825451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411912729 + 411912730.

It is an arithmetic number, because the mean of its divisors is an integer number (411912730).

Almost surely, 2^823825459 is an apocalyptic number.

823825459 is a deficient number, since it is larger than the sum of its proper divisors (1).

823825459 is an equidigital number, since it uses as much as digits as its factorization.

823825459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691200, while the sum is 46.

The square root of 823825459 is about 28702.3598158758. The cubic root of 823825459 is about 937.4434299258.

The spelling of 823825459 in words is "eight hundred twenty-three million, eight hundred twenty-five thousand, four hundred fifty-nine".