206989499543 has 2 divisors, whose sum is σ = 206989499544. Its totient is φ = 206989499542.

The previous prime is 206989499537. The next prime is 206989499567. The reversal of 206989499543 is 345994989602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206989499543 - 2²⁰ = 206988450967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206989492543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103494749771 + 103494749772.

It is an arithmetic number, because the mean of its divisors is an integer number (103494749772).

Almost surely, 2^206989499543 is an apocalyptic number.

206989499543 is a deficient number, since it is larger than the sum of its proper divisors (1).

206989499543 is an equidigital number, since it uses as much as digits as its factorization.

206989499543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151165440, while the sum is 68.

The spelling of 206989499543 in words is "two hundred six billion, nine hundred eighty-nine million, four hundred ninety-nine thousand, five hundred forty-three".