205268743 has 2 divisors, whose sum is σ = 205268744. Its totient is φ = 205268742.

The previous prime is 205268741. The next prime is 205268753. The reversal of 205268743 is 347862502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205268743 - 2¹ = 205268741 is a prime.

Together with 205268741, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205268741) 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, 102634371 + 102634372.

It is an arithmetic number, because the mean of its divisors is an integer number (102634372).

Almost surely, 2^205268743 is an apocalyptic number.

205268743 is a deficient number, since it is larger than the sum of its proper divisors (1).

205268743 is an equidigital number, since it uses as much as digits as its factorization.

205268743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 205268743 is about 14327.2029021718. The cubic root of 205268743 is about 589.8944012867.

It can be divided in two parts, 2052687 and 43, that multiplied together give a triangular number (88265541 = T₁₃₂₈₆).

The spelling of 205268743 in words is "two hundred five million, two hundred sixty-eight thousand, seven hundred forty-three".