823870339 has 2 divisors, whose sum is σ = 823870340. Its totient is φ = 823870338.

The previous prime is 823870321. The next prime is 823870393. The reversal of 823870339 is 933078328.

Together with next prime (823870393) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 823870339 - 2²³ = 815481731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 823870295 and 823870304.

It is not a weakly prime, because it can be changed into another prime (823870939) 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, 411935169 + 411935170.

It is an arithmetic number, because the mean of its divisors is an integer number (411935170).

Almost surely, 2^823870339 is an apocalyptic number.

823870339 is a deficient number, since it is larger than the sum of its proper divisors (1).

823870339 is an equidigital number, since it uses as much as digits as its factorization.

823870339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 823870339 is about 28703.1416224775. The cubic root of 823870339 is about 937.4604528266.

The spelling of 823870339 in words is "eight hundred twenty-three million, eight hundred seventy thousand, three hundred thirty-nine".