823939339 has 2 divisors, whose sum is σ = 823939340. Its totient is φ = 823939338.

The previous prime is 823939283. The next prime is 823939349. The reversal of 823939339 is 933939328.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 823939339 - 2⁹ = 823938827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 823939292 and 823939301.

It is not a weakly prime, because it can be changed into another prime (823939349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411969669 + 411969670.

It is an arithmetic number, because the mean of its divisors is an integer number (411969670).

Almost surely, 2^823939339 is an apocalyptic number.

823939339 is a deficient number, since it is larger than the sum of its proper divisors (1).

823939339 is an equidigital number, since it uses as much as digits as its factorization.

823939339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 944784, while the sum is 49.

The square root of 823939339 is about 28704.3435563331. The cubic root of 823939339 is about 937.4866231928.

The spelling of 823939339 in words is "eight hundred twenty-three million, nine hundred thirty-nine thousand, three hundred thirty-nine".