823816349 has 2 divisors, whose sum is σ = 823816350. Its totient is φ = 823816348.

The previous prime is 823816333. The next prime is 823816429. The reversal of 823816349 is 943618328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 495952900 + 327863449 = 22270^2 + 18107^2 .

It is a cyclic number.

It is not a de Polignac number, because 823816349 - 2⁴ = 823816333 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (823816319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411908174 + 411908175.

It is an arithmetic number, because the mean of its divisors is an integer number (411908175).

Almost surely, 2^823816349 is an apocalyptic number.

It is an amenable number.

823816349 is a deficient number, since it is larger than the sum of its proper divisors (1).

823816349 is an equidigital number, since it uses as much as digits as its factorization.

823816349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 44.

The square root of 823816349 is about 28702.2011176843. The cubic root of 823816349 is about 937.4399744442.

The spelling of 823816349 in words is "eight hundred twenty-three million, eight hundred sixteen thousand, three hundred forty-nine".