206679091 has 2 divisors, whose sum is σ = 206679092. Its totient is φ = 206679090.

The previous prime is 206679049. The next prime is 206679103. The reversal of 206679091 is 190976602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206679091 - 2¹¹ = 206677043 is a prime.

It is not a weakly prime, because it can be changed into another prime (206679191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103339545 + 103339546.

It is an arithmetic number, because the mean of its divisors is an integer number (103339546).

Almost surely, 2^206679091 is an apocalyptic number.

206679091 is a deficient number, since it is larger than the sum of its proper divisors (1).

206679091 is an equidigital number, since it uses as much as digits as its factorization.

206679091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 206679091 is about 14376.3378855674. The cubic root of 206679091 is about 591.2423224423.

The spelling of 206679091 in words is "two hundred six million, six hundred seventy-nine thousand, ninety-one".