206543023 has 2 divisors, whose sum is σ = 206543024. Its totient is φ = 206543022.

The previous prime is 206542997. The next prime is 206543033. The reversal of 206543023 is 320345602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206543023 - 2¹⁷ = 206411951 is a prime.

It is a super-3 number, since 3×206543023³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206543033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103271511 + 103271512.

It is an arithmetic number, because the mean of its divisors is an integer number (103271512).

Almost surely, 2^206543023 is an apocalyptic number.

206543023 is a deficient number, since it is larger than the sum of its proper divisors (1).

206543023 is an equidigital number, since it uses as much as digits as its factorization.

206543023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 206543023 is about 14371.6047468611. The cubic root of 206543023 is about 591.1125450483.

Adding to 206543023 its reverse (320345602), we get a palindrome (526888625).

The spelling of 206543023 in words is "two hundred six million, five hundred forty-three thousand, twenty-three".