206985707 has 2 divisors, whose sum is σ = 206985708. Its totient is φ = 206985706.

The previous prime is 206985689. The next prime is 206985719. The reversal of 206985707 is 707589602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206985707 - 2⁶ = 206985643 is a prime.

It is a Chen prime.

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, 103492853 + 103492854.

It is an arithmetic number, because the mean of its divisors is an integer number (103492854).

Almost surely, 2^206985707 is an apocalyptic number.

206985707 is a deficient number, since it is larger than the sum of its proper divisors (1).

206985707 is an equidigital number, since it uses as much as digits as its factorization.

206985707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 206985707 is about 14386.9978452768. The cubic root of 206985707 is about 591.5345545230.

The spelling of 206985707 in words is "two hundred six million, nine hundred eighty-five thousand, seven hundred seven".