205029823 has 2 divisors, whose sum is σ = 205029824. Its totient is φ = 205029822.

The previous prime is 205029791. The next prime is 205029829. The reversal of 205029823 is 328920502.

205029823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205029823 - 2⁵ = 205029791 is a prime.

It is a super-2 number, since 2×205029823² = 84074456638822658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205029829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102514911 + 102514912.

It is an arithmetic number, because the mean of its divisors is an integer number (102514912).

Almost surely, 2^205029823 is an apocalyptic number.

205029823 is a deficient number, since it is larger than the sum of its proper divisors (1).

205029823 is an equidigital number, since it uses as much as digits as its factorization.

205029823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 205029823 is about 14318.8624897371. The cubic root of 205029823 is about 589.6654456836.

The spelling of 205029823 in words is "two hundred five million, twenty-nine thousand, eight hundred twenty-three".