206326691 has 2 divisors, whose sum is σ = 206326692. Its totient is φ = 206326690.

The previous prime is 206326661. The next prime is 206326697. The reversal of 206326691 is 196623602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206326691 - 2²² = 202132387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206326697) 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, 103163345 + 103163346.

It is an arithmetic number, because the mean of its divisors is an integer number (103163346).

Almost surely, 2^206326691 is an apocalyptic number.

206326691 is a deficient number, since it is larger than the sum of its proper divisors (1).

206326691 is an equidigital number, since it uses as much as digits as its factorization.

206326691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 206326691 is about 14364.0764060903. The cubic root of 206326691 is about 590.9060969696.

The spelling of 206326691 in words is "two hundred six million, three hundred twenty-six thousand, six hundred ninety-one".