206985799 has 2 divisors, whose sum is σ = 206985800. Its totient is φ = 206985798.

The previous prime is 206985797. The next prime is 206985841. The reversal of 206985799 is 997589602.

206985799 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206985799 - 2¹ = 206985797 is a prime.

Together with 206985797, 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 (206985797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103492899 + 103492900.

It is an arithmetic number, because the mean of its divisors is an integer number (103492900).

Almost surely, 2^206985799 is an apocalyptic number.

206985799 is a deficient number, since it is larger than the sum of its proper divisors (1).

206985799 is an equidigital number, since it uses as much as digits as its factorization.

206985799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The square root of 206985799 is about 14387.0010426079. The cubic root of 206985799 is about 591.5346421638.

The spelling of 206985799 in words is "two hundred six million, nine hundred eighty-five thousand, seven hundred ninety-nine".