206886671 has 2 divisors, whose sum is σ = 206886672. Its totient is φ = 206886670.

The previous prime is 206886643. The next prime is 206886677. The reversal of 206886671 is 176688602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206886671 - 2¹⁸ = 206624527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206886677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103443335 + 103443336.

It is an arithmetic number, because the mean of its divisors is an integer number (103443336).

Almost surely, 2^206886671 is an apocalyptic number.

206886671 is a deficient number, since it is larger than the sum of its proper divisors (1).

206886671 is an equidigital number, since it uses as much as digits as its factorization.

206886671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 206886671 is about 14383.5555757261. Note that the first 4 decimals coincide. The cubic root of 206886671 is about 591.4401960560.

The spelling of 206886671 in words is "two hundred six million, eight hundred eighty-six thousand, six hundred seventy-one".