205696823 has 2 divisors, whose sum is σ = 205696824. Its totient is φ = 205696822.

The previous prime is 205696789. The next prime is 205696837. The reversal of 205696823 is 328696502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205696823 - 2¹⁰ = 205695799 is a prime.

It is a super-2 number, since 2×205696823² = 84622365984586658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205696853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102848411 + 102848412.

It is an arithmetic number, because the mean of its divisors is an integer number (102848412).

Almost surely, 2^205696823 is an apocalyptic number.

205696823 is a deficient number, since it is larger than the sum of its proper divisors (1).

205696823 is an equidigital number, since it uses as much as digits as its factorization.

205696823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 205696823 is about 14342.1345343014. The cubic root of 205696823 is about 590.3041838529.

The spelling of 205696823 in words is "two hundred five million, six hundred ninety-six thousand, eight hundred twenty-three".