206983669 has 2 divisors, whose sum is σ = 206983670. Its totient is φ = 206983668.

The previous prime is 206983633. The next prime is 206983691. The reversal of 206983669 is 966389602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199854769 + 7128900 = 14137^2 + 2670^2 .

It is a cyclic number.

It is not a de Polignac number, because 206983669 - 2⁹ = 206983157 is a prime.

It is a super-2 number, since 2×206983669² = 85684478465403122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206923669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103491834 + 103491835.

It is an arithmetic number, because the mean of its divisors is an integer number (103491835).

Almost surely, 2^206983669 is an apocalyptic number.

It is an amenable number.

206983669 is a deficient number, since it is larger than the sum of its proper divisors (1).

206983669 is an equidigital number, since it uses as much as digits as its factorization.

206983669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 206983669 is about 14386.9270172612. The cubic root of 206983669 is about 591.5326130824.

The spelling of 206983669 in words is "two hundred six million, nine hundred eighty-three thousand, six hundred sixty-nine".