205023653 has 2 divisors, whose sum is σ = 205023654. Its totient is φ = 205023652.

The previous prime is 205023619. The next prime is 205023691. The reversal of 205023653 is 356320502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150234049 + 54789604 = 12257^2 + 7402^2 .

It is a cyclic number.

It is not a de Polignac number, because 205023653 - 2⁶ = 205023589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205023853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102511826 + 102511827.

It is an arithmetic number, because the mean of its divisors is an integer number (102511827).

Almost surely, 2^205023653 is an apocalyptic number.

It is an amenable number.

205023653 is a deficient number, since it is larger than the sum of its proper divisors (1).

205023653 is an equidigital number, since it uses as much as digits as its factorization.

205023653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 205023653 is about 14318.6470380410. The cubic root of 205023653 is about 589.6595306542.

The spelling of 205023653 in words is "two hundred five million, twenty-three thousand, six hundred fifty-three".