823693697 has 2 divisors, whose sum is σ = 823693698. Its totient is φ = 823693696.

The previous prime is 823693693. The next prime is 823693721. The reversal of 823693697 is 796396328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 773340481 + 50353216 = 27809^2 + 7096^2 .

It is a cyclic number.

It is not a de Polignac number, because 823693697 - 2² = 823693693 is a prime.

It is not a weakly prime, because it can be changed into another prime (823693693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411846848 + 411846849.

It is an arithmetic number, because the mean of its divisors is an integer number (411846849).

Almost surely, 2^823693697 is an apocalyptic number.

It is an amenable number.

823693697 is a deficient number, since it is larger than the sum of its proper divisors (1).

823693697 is an equidigital number, since it uses as much as digits as its factorization.

823693697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 53.

The square root of 823693697 is about 28700.0644075932. The cubic root of 823693697 is about 937.3934492713.

The spelling of 823693697 in words is "eight hundred twenty-three million, six hundred ninety-three thousand, six hundred ninety-seven".