206001791 has 2 divisors, whose sum is σ = 206001792. Its totient is φ = 206001790.

The previous prime is 206001773. The next prime is 206001797. The reversal of 206001791 is 197100602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206001791 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206001791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206001797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103000895 + 103000896.

It is an arithmetic number, because the mean of its divisors is an integer number (103000896).

Almost surely, 2^206001791 is an apocalyptic number.

206001791 is a deficient number, since it is larger than the sum of its proper divisors (1).

206001791 is an equidigital number, since it uses as much as digits as its factorization.

206001791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 206001791 is about 14352.7624867131. The cubic root of 206001791 is about 590.5957699335.

The spelling of 206001791 in words is "two hundred six million, one thousand, seven hundred ninety-one".