206764091 has 2 divisors, whose sum is σ = 206764092. Its totient is φ = 206764090.

The previous prime is 206764073. The next prime is 206764097. The reversal of 206764091 is 190467602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206764091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206764097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103382045 + 103382046.

It is an arithmetic number, because the mean of its divisors is an integer number (103382046).

Almost surely, 2^206764091 is an apocalyptic number.

206764091 is a deficient number, since it is larger than the sum of its proper divisors (1).

206764091 is an equidigital number, since it uses as much as digits as its factorization.

206764091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 206764091 is about 14379.2938282796. The cubic root of 206764091 is about 591.3233638760.

The spelling of 206764091 in words is "two hundred six million, seven hundred sixty-four thousand, ninety-one".