206945693 has 2 divisors, whose sum is σ = 206945694. Its totient is φ = 206945692.

The previous prime is 206945689. The next prime is 206945771. The reversal of 206945693 is 396549602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131377444 + 75568249 = 11462^2 + 8693^2 .

It is a cyclic number.

It is not a de Polignac number, because 206945693 - 2² = 206945689 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206945603) 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, 103472846 + 103472847.

It is an arithmetic number, because the mean of its divisors is an integer number (103472847).

Almost surely, 2^206945693 is an apocalyptic number.

It is an amenable number.

206945693 is a deficient number, since it is larger than the sum of its proper divisors (1).

206945693 is an equidigital number, since it uses as much as digits as its factorization.

206945693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 44.

The square root of 206945693 is about 14385.6071474234. The cubic root of 206945693 is about 591.4964340341.

The spelling of 206945693 in words is "two hundred six million, nine hundred forty-five thousand, six hundred ninety-three".