823924715617 has 2 divisors, whose sum is σ = 823924715618. Its totient is φ = 823924715616.

The previous prime is 823924715567. The next prime is 823924715641. The reversal of 823924715617 is 716517429328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 601933912336 + 221990803281 = 775844^2 + 471159^2 .

It is a cyclic number.

It is not a de Polignac number, because 823924715617 - 2²⁷ = 823790497889 is a prime.

It is not a weakly prime, because it can be changed into another prime (823924710617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411962357808 + 411962357809.

It is an arithmetic number, because the mean of its divisors is an integer number (411962357809).

Almost surely, 2^823924715617 is an apocalyptic number.

It is an amenable number.

823924715617 is a deficient number, since it is larger than the sum of its proper divisors (1).

823924715617 is an equidigital number, since it uses as much as digits as its factorization.

823924715617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 55.

The spelling of 823924715617 in words is "eight hundred twenty-three billion, nine hundred twenty-four million, seven hundred fifteen thousand, six hundred seventeen".